diff --git a/ANNOUNCE b/ANNOUNCE
index 675f349..ad813fa 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.4.6beta04 - January 23, 2011
+Libpng 1.4.6beta05 - January 23, 2011
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,20 +9,20 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.4.6beta04.tar.xz (LZMA-compressed, recommended)
-   1.4.6beta04.tar.gz
-   1.4.6beta04.tar.bz2
+   1.4.6beta05.tar.xz (LZMA-compressed, recommended)
+   1.4.6beta05.tar.gz
+   1.4.6beta05.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp146b04.7z (LZMA-compressed, recommended)
-   lp146b04.zip
+   lp146b05.7z (LZMA-compressed, recommended)
+   lp146b05.zip
 
 Other information:
 
-   1.4.6beta04-README.txt
-   1.4.6beta04-LICENSE.txt
+   1.4.6beta05-README.txt
+   1.4.6beta05-LICENSE.txt
 
 Changes since the last public release (1.4.5):
 
@@ -43,10 +43,14 @@
   Added png_const_structp and png_const_infop types, and used them in
     prototypes for most png_get_*() functions.
   In the manual, describe the png_get_IHDR() arguments in the correct order.
+
+version 1.4.6beta05 [January 23, 2011]
   Updated the synopses in the manual to reflect recent changes.
   Fixed a typo in the *.def files and deleted entries that are now
     declared in pngpriv.h
 
+version 1.4.6beta06 [January 23, 2011]
+
 Send comments/corrections/commendations to glennrp at users.sourceforge.net
 or to png-mng-implement at lists.sf.net (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement).
diff --git a/CHANGES b/CHANGES
index 5731344..7f6d2f9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2754,10 +2754,16 @@
   In the manual, describe the png_get_IHDR() arguments in the correct order.
   Ported change in png_do_rgb_to_gray() from libpng-1.5.1, to make
     it more robust against internal libpng coding errors.
+
+version 1.4.6beta05 [January 23, 2011]
+
   Updated the synopses in the manual to reflect recent changes.
   Fixed a typo in the *.def files and deleted entries that are now
     declared in pngpriv.h
 
+version 1.4.6beta06 [January 23, 2011]
+
+
 Send comments/corrections/commendations to glennrp at users.sourceforge.net
 or to png-mng-implement at lists.sf.net (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement).
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c7679e4..2ca9920 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -255,7 +255,7 @@
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 14.${PNGLIB_RELEASE}.1.4.6beta04
+#   VERSION 14.${PNGLIB_RELEASE}.1.4.6beta05
     VERSION 14.${PNGLIB_RELEASE}.0
     SOVERSION 14
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/INSTALL b/INSTALL
index a1368dd..07afb9d 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.4.6beta04 - January 22, 2011
+Installing libpng version 1.4.6beta05 - January 23, 2011
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -46,7 +46,7 @@
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.4.6beta04" or "libpng14" and "zlib-1.2.3"
+might be called "libpng-1.4.6beta05" or "libpng14" and "zlib-1.2.3"
 or "zlib123") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
diff --git a/LICENSE b/LICENSE
index dea50f2..4972e35 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.4.6beta04, January 22, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.4.6beta05, January 23, 2011, are
 Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -108,4 +108,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-January 22, 2011
+January 23, 2011
diff --git a/README b/README
index ca60f57..c5e2abb 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.4.6beta04 - January 22, 2011 (shared library 14.0)
+README for libpng version 1.4.6beta05 - January 23, 2011 (shared library 14.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -185,9 +185,9 @@
        makefile.std     =>  Generic UNIX makefile (cc, creates static
                             libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            (gcc, creates libpng14.so.14.1.4.6beta04)
+                            (gcc, creates libpng14.so.14.1.4.6beta05)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng14.so.14.1.4.6beta04)
+                            (gcc, creates libpng14.so.14.1.4.6beta05)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
                             ansi2knr (Requires ansi2knr.c from
@@ -209,12 +209,12 @@
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng14.so.14.1.4.6beta04)
+                            (gcc, creates libpng14.so.14.1.4.6beta05)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng14.so.14.1.4.6beta04)
+                            (gcc, creates libpng14.so.14.1.4.6beta05)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng14.so.14.1.4.6beta04)
+                            (gcc, creates libpng14.so.14.1.4.6beta05)
        makefile.32sunu  =>  Sun Ultra 32-bit makefile
        makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
diff --git a/configure b/configure
index c650fbe..698d784 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.65 for libpng 1.4.6beta04.
+# Generated by GNU Autoconf 2.65 for libpng 1.4.6beta05.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -562,8 +562,8 @@
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.4.6beta04'
-PACKAGE_STRING='libpng 1.4.6beta04'
+PACKAGE_VERSION='1.4.6beta05'
+PACKAGE_STRING='libpng 1.4.6beta05'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1292,7 +1292,7 @@
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures libpng 1.4.6beta04 to adapt to many kinds of systems.
+\`configure' configures libpng 1.4.6beta05 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1362,7 +1362,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.4.6beta04:";;
+     short | recursive ) echo "Configuration of libpng 1.4.6beta05:";;
    esac
   cat <<\_ACEOF
 
@@ -1467,7 +1467,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.4.6beta04
+libpng configure 1.4.6beta05
 generated by GNU Autoconf 2.65
 
 Copyright (C) 2009 Free Software Foundation, Inc.
@@ -1892,7 +1892,7 @@
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng $as_me 1.4.6beta04, which was
+It was created by libpng $as_me 1.4.6beta05, which was
 generated by GNU Autoconf 2.65.  Invocation command line was
 
   $ $0 $@
@@ -2700,7 +2700,7 @@
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.4.6beta04'
+ VERSION='1.4.6beta05'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2764,7 +2764,7 @@
 
 
 
-PNGLIB_VERSION=1.4.6beta04
+PNGLIB_VERSION=1.4.6beta05
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=4
 PNGLIB_RELEASE=6
@@ -12175,7 +12175,7 @@
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng $as_me 1.4.6beta04, which was
+This file was extended by libpng $as_me 1.4.6beta05, which was
 generated by GNU Autoconf 2.65.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -12241,7 +12241,7 @@
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-libpng config.status 1.4.6beta04
+libpng config.status 1.4.6beta05
 configured by $0, generated by GNU Autoconf 2.65,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index a978f03..872c287 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,14 +16,14 @@
 dnl stamps are correct
 AC_PREREQ(2.59)
 
-AC_INIT([libpng], [1.4.6beta04], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.4.6beta05], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
 dnl Version number stuff here:
 
-PNGLIB_VERSION=1.4.6beta04
+PNGLIB_VERSION=1.4.6beta05
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=4
 PNGLIB_RELEASE=6
diff --git a/libpng-1.4.6beta04.txt b/libpng-1.4.6beta05.txt
similarity index 99%
rename from libpng-1.4.6beta04.txt
rename to libpng-1.4.6beta05.txt
index c210e32..8d2fa76 100644
--- a/libpng-1.4.6beta04.txt
+++ b/libpng-1.4.6beta05.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.6beta04 - January 23, 2011
+ libpng version 1.4.6beta05 - January 23, 2011
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.6beta04 - January 23, 2011
+ libpng versions 0.97, January 1998, through 1.4.6beta05 - January 23, 2011
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
@@ -905,7 +905,7 @@
 As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
 added.  It expands the sample depth without changing tRNS to alpha.
 
-As of libpng version 1.4.6beta04, not all possible expansions are supported.
+As of libpng version 1.4.6beta05, not all possible expansions are supported.
 
 In the following table, the 01 means grayscale with depth<8, 31 means
 indexed with depth<8, other numerals represent the color type, "T" means
@@ -3311,7 +3311,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.4.6beta04 are Y2K compliant.  It is my belief that earlier
+upward through 1.4.6beta05 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
diff --git a/libpng.3 b/libpng.3
index 8fc2c07..47de1e7 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
 .TH LIBPNG 3 "January 23, 2011"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.4.6beta04
+libpng \- Portable Network Graphics (PNG) Reference Library 1.4.6beta05
 .SH SYNOPSIS
 \fI\fB
 
@@ -895,7 +895,7 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.6beta04 - January 23, 2011
+ libpng version 1.4.6beta05 - January 23, 2011
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
@@ -906,7 +906,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.6beta04 - January 23, 2011
+ libpng versions 0.97, January 1998, through 1.4.6beta05 - January 23, 2011
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
@@ -1800,7 +1800,7 @@
 As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
 added.  It expands the sample depth without changing tRNS to alpha.
 
-As of libpng version 1.4.6beta04, not all possible expansions are supported.
+As of libpng version 1.4.6beta05, not all possible expansions are supported.
 
 In the following table, the 01 means grayscale with depth<8, 31 means
 indexed with depth<8, other numerals represent the color type, "T" means
@@ -4206,7 +4206,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.4.6beta04 are Y2K compliant.  It is my belief that earlier
+upward through 1.4.6beta05 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
@@ -4398,7 +4398,7 @@
  1.4.5beta05-07      14    10405  14.so.14.5[.0]
  1.4.5rc02-03        14    10405  14.so.14.5[.0]
  1.4.5               14    10405  14.so.14.5[.0]
- 1.4.6beta01-04      14    10406  14.so.14.6[.0]
+ 1.4.6beta01-05      14    10406  14.so.14.6[.0]
  1.4.6rc01           14    10406  14.so.14.6[.0]
 
 Henceforth the source version will match the shared-library minor
@@ -4455,7 +4455,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.4.6beta04 - January 23, 2011:
+Libpng version 1.4.6beta05 - January 23, 2011:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4478,7 +4478,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.4.6beta04, January 23, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.4.6beta05, January 23, 2011, are
 Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
diff --git a/libpngpf.3 b/libpngpf.3
index a349c7e..8f409b8 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "January 22, 2011"
+.TH LIBPNGPF 3 "January 23, 2011"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.4.6beta04
+libpng \- Portable Network Graphics (PNG) Reference Library 1.4.6beta05
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/png.5 b/png.5
index e038db5..847d2d9 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "January 22, 2011"
+.TH PNG 5 "January 23, 2011"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index acbead5..7fa43de 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.4.6 [January 22, 2011]
+ * Last changed in libpng 1.4.6 [January 23, 2011]
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -17,7 +17,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_4_6beta04 Your_png_h_is_not_version_1_4_6beta04;
+typedef version_1_4_6beta05 Your_png_h_is_not_version_1_4_6beta05;
 
 /* Tells libpng that we have already handled the first "num_bytes" bytes
  * of the PNG file signature.  If the PNG data is embedded into another
@@ -539,7 +539,7 @@
 #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
 
 png_charp PNGAPI
-png_get_copyright(const_png_structp png_ptr)
+png_get_copyright(png_const_structp png_ptr)
 {
    png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
 #ifdef PNG_STRING_COPYRIGHT
@@ -547,13 +547,13 @@
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version 1.4.6beta04 - January 22, 2011" PNG_STRING_NEWLINE \
+     "libpng version 1.4.6beta05 - January 23, 2011" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2010 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
-      return ((png_charp) "libpng version 1.4.6beta04 - January 22, 2011\
+      return ((png_charp) "libpng version 1.4.6beta05 - January 23, 2011\
       Copyright (c) 1998-2010 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
@@ -570,7 +570,7 @@
  * it is guaranteed that png.c uses the correct version of png.h.
  */
 png_charp PNGAPI
-png_get_libpng_ver(const_png_structp png_ptr)
+png_get_libpng_ver(png_const_structp png_ptr)
 {
    /* Version of *.c files used when building libpng */
    png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
@@ -578,7 +578,7 @@
 }
 
 png_charp PNGAPI
-png_get_header_ver(const_png_structp png_ptr)
+png_get_header_ver(png_const_structp png_ptr)
 {
    /* Version of *.h files used when building libpng */
    png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
@@ -586,7 +586,7 @@
 }
 
 png_charp PNGAPI
-png_get_header_version(const_png_structp png_ptr)
+png_get_header_version(png_const_structp png_ptr)
 {
    /* Returns longer string containing both version and date */
    png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
diff --git a/png.h b/png.h
index f0b3591..2054866 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.4.6beta04 - January 22, 2011
+ * libpng version 1.4.6beta05 - January 23, 2011
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -11,7 +11,7 @@
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.4.6beta04 - January 22, 2011: Glenn
+ *  libpng versions 0.97, January 1998, through 1.4.6beta05 - January 23, 2011: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -153,7 +153,7 @@
  *    1.4.5beta05-07          14    10405  14.so.14.5[.0]
  *    1.4.5rc02-03            14    10405  14.so.14.5[.0]
  *    1.4.5                   14    10405  14.so.14.5[.0]
- *    1.4.6beta01-04          14    10406  14.so.14.6[.0]
+ *    1.4.6beta01-05          14    10406  14.so.14.6[.0]
  *    1.4.6rc01               14    10406  14.so.14.6[.0]
  *
  *    Henceforth the source version will match the shared-library major
@@ -186,7 +186,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.4.6beta04, January 22, 2011, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.4.6beta05, January 23, 2011, are
  * Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -298,13 +298,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    January 22, 2011
+ *    January 23, 2011
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.4.6beta04 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.4.6beta05 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -360,9 +360,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.4.6beta04"
+#define PNG_LIBPNG_VER_STRING "1.4.6beta05"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.4.6beta04 - January 22, 2011\n"
+   " libpng version 1.4.6beta05 - January 23, 2011\n"
 
 #define PNG_LIBPNG_VER_SONUM   14
 #define PNG_LIBPNG_VER_DLLNUM  14
@@ -375,7 +375,7 @@
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  04
+#define PNG_LIBPNG_VER_BUILD  05
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -907,7 +907,7 @@
 } png_info;
 
 typedef png_info FAR * png_infop;
-typedef PNG_CONST png_info FAR * const_png_infop;
+typedef PNG_CONST png_info FAR * png_const_infop;
 typedef png_info FAR * FAR * png_infopp;
 
 /* Maximum positive integer used in PNG is (2^31)-1 */
@@ -1028,7 +1028,7 @@
  */
 typedef struct png_struct_def png_struct;
 typedef png_struct FAR * png_structp;
-typedef PNG_CONST png_struct FAR * const_png_structp;
+typedef PNG_CONST png_struct FAR * png_const_structp;
 
 typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp));
 typedef void (PNGAPI *png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t));
@@ -1486,7 +1486,7 @@
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_4_6beta04;
+typedef png_structp version_1_4_6beta05;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -1529,7 +1529,7 @@
    png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED;
 
 PNG_EXPORT(png_size_t,png_get_compression_buffer_size)
-   PNGARG((const_png_structp png_ptr));
+   PNGARG((png_const_structp png_ptr));
 
 PNG_EXPORT(void,png_set_compression_buffer_size)
    PNGARG((png_structp png_ptr, png_size_t size));
@@ -1651,7 +1651,7 @@
 #endif
 PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr,
    int error_action, png_fixed_point red, png_fixed_point green ));
-PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((const_png_structp
+PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_const_structp
    png_ptr));
 #endif
 
@@ -1973,7 +1973,7 @@
    png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn));
 
 /* Return the user pointer associated with the error functions */
-PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((const_png_structp png_ptr));
+PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_const_structp png_ptr));
 
 /* Replace the default data output functions with a user supplied one(s).
  * If buffered output is not used, then output_flush_fn can be set to NULL.
@@ -2006,7 +2006,7 @@
 PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr,
    png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn));
 /* Return the user pointer associated with the memory functions */
-PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((const_png_structp png_ptr));
+PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_const_structp png_ptr));
 #endif
 
 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
@@ -2026,13 +2026,13 @@
    int user_transform_channels));
 /* Return the user pointer associated with the user transform functions */
 PNG_EXPORT(png_voidp,png_get_user_transform_ptr)
-   PNGARG((const_png_structp png_ptr));
+   PNGARG((png_const_structp png_ptr));
 #endif
 
 #ifdef PNG_USER_CHUNKS_SUPPORTED
 PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr,
    png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
-PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((const_png_structp
+PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_const_structp
    png_ptr));
 #endif
 
@@ -2047,7 +2047,7 @@
 
 /* Returns the user pointer associated with the push read functions */
 PNG_EXPORT(png_voidp,png_get_progressive_ptr)
-   PNGARG((const_png_structp png_ptr));
+   PNGARG((png_const_structp png_ptr));
 
 /* Function to be called when data becomes available */
 PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr,
@@ -2155,19 +2155,19 @@
  * png_info_struct.
  */
 /* Returns "flag" if chunk data is valid in info_ptr. */
-PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_uint_32 flag));
+PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_uint_32 flag));
 
 /* Returns number of bytes needed to hold a transformed row. */
-PNG_EXPORT(png_size_t,png_get_rowbytes) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr));
+PNG_EXPORT(png_size_t,png_get_rowbytes) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr));
 
 #ifdef PNG_INFO_IMAGE_SUPPORTED
 /* Returns row_pointers, which is an array of pointers to scanlines that was
  * returned from png_read_png().
  */
-PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr));
+PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr));
 /* Set row_pointers, which is an array of pointers to scanlines for use
  * by png_write_png().
  */
@@ -2176,70 +2176,70 @@
 #endif
 
 /* Returns number of color channels in image. */
-PNG_EXPORT(png_byte,png_get_channels) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr));
+PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr));
 
 #ifdef PNG_EASY_ACCESS_SUPPORTED
 /* Returns image width in pixels. */
-PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns image height in pixels. */
-PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns image bit_depth. */
-PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns image color_type. */
-PNG_EXPORT(png_byte, png_get_color_type) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns image filter_type. */
-PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns image interlace_type. */
-PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns image compression_type. */
-PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns image resolution in pixels per meter, from pHYs chunk data. */
-PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
-PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
-PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 /* Returns pixel aspect ratio, computed from pHYs chunk data.  */
 #ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 #endif
 
 /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */
-PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
-PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
-PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
-PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr));
+PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr));
 
 #endif /* PNG_EASY_ACCESS_SUPPORTED */
 
 /* Returns pointer to signature string read from PNG header */
-PNG_EXPORT(png_bytep,png_get_signature) PNGARG((const_png_structp png_ptr,
+PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_const_structp png_ptr,
    png_infop info_ptr));
 
 #ifdef PNG_bKGD_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((const_png_structp png_ptr,
+PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_const_structp png_ptr,
    png_infop info_ptr, png_color_16p *background));
 #endif
 
@@ -2250,14 +2250,14 @@
 
 #ifdef PNG_cHRM_SUPPORTED
 #ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, double *white_x, double *white_y, double *red_x,
+PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, double *white_x, double *white_y, double *red_x,
    double *red_y, double *green_x, double *green_y, double *blue_x,
    double *blue_y));
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point
+PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point
    *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_red_y,
    png_fixed_point *int_green_x, png_fixed_point *int_green_y, png_fixed_point
    *int_blue_x, png_fixed_point *int_blue_y));
@@ -2281,11 +2281,11 @@
 
 #ifdef PNG_gAMA_SUPPORTED
 #ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, double *file_gamma));
+PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, double *file_gamma));
 #endif
-PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_fixed_point *int_file_gamma));
+PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_fixed_point *int_file_gamma));
 #endif
 
 #ifdef PNG_gAMA_SUPPORTED
@@ -2298,8 +2298,8 @@
 #endif
 
 #ifdef PNG_hIST_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_uint_16p *hist));
+PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_uint_16p *hist));
 #endif
 
 #ifdef PNG_hIST_SUPPORTED
@@ -2318,8 +2318,8 @@
    int filter_method));
 
 #ifdef PNG_oFFs_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y,
+PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y,
    int *unit_type));
 #endif
 
@@ -2330,8 +2330,8 @@
 #endif
 
 #ifdef PNG_pCAL_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1,
+PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1,
    int *type, int *nparams, png_charp *units, png_charpp *params));
 #endif
 
@@ -2342,8 +2342,8 @@
 #endif
 
 #ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
+PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
 #endif
 
 #ifdef PNG_pHYs_SUPPORTED
@@ -2351,14 +2351,14 @@
    png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type));
 #endif
 
-PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_colorp *palette, int *num_palette));
+PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_colorp *palette, int *num_palette));
 
 PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_colorp palette, int num_palette));
 
 #ifdef PNG_sBIT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((const_png_structp png_ptr,
+PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_const_structp png_ptr,
    png_infop info_ptr, png_color_8p *sig_bit));
 #endif
 
@@ -2368,8 +2368,8 @@
 #endif
 
 #ifdef PNG_sRGB_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, int *intent));
+PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, int *intent));
 #endif
 
 #ifdef PNG_sRGB_SUPPORTED
@@ -2380,8 +2380,8 @@
 #endif
 
 #ifdef PNG_iCCP_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_charpp name, int *compression_type,
+PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_charpp name, int *compression_type,
    png_charpp profile, png_uint_32 *proflen));
    /* Note to maintainer: profile should be png_bytepp */
 #endif
@@ -2394,8 +2394,8 @@
 #endif
 
 #ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_sPLT_tpp entries));
+PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_sPLT_tpp entries));
 #endif
 
 #ifdef PNG_sPLT_SUPPORTED
@@ -2405,8 +2405,8 @@
 
 #ifdef PNG_TEXT_SUPPORTED
 /* png_get_text also returns the number of text chunks in *num_text */
-PNG_EXPORT(png_uint_32,png_get_text) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_textp *text_ptr, int *num_text));
+PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_textp *text_ptr, int *num_text));
 #endif
 
 /* Note while png_set_text() will accept a structure whose text,
@@ -2422,7 +2422,7 @@
 #endif
 
 #ifdef PNG_tIME_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((const_png_structp png_ptr,
+PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_const_structp png_ptr,
    png_infop info_ptr, png_timep *mod_time));
 #endif
 
@@ -2432,7 +2432,7 @@
 #endif
 
 #ifdef PNG_tRNS_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((const_png_structp png_ptr,
+PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_const_structp png_ptr,
    png_infop info_ptr, png_bytep *trans_alpha, int *num_trans,
    png_color_16p *trans_color));
 #endif
@@ -2448,12 +2448,12 @@
 
 #ifdef PNG_sCAL_SUPPORTED
 #ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, int *unit, double *width, double *height));
+PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, int *unit, double *width, double *height));
 #else
 #ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight));
+PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight));
 #endif
 #endif
 #endif /* PNG_sCAL_SUPPORTED */
@@ -2490,8 +2490,8 @@
    png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns));
 PNG_EXPORT(void, png_set_unknown_chunk_location)
    PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location));
-PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((const_png_structp
-   png_ptr, const_png_infop info_ptr, png_unknown_chunkpp entries));
+PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_const_structp
+   png_ptr, png_const_infop info_ptr, png_unknown_chunkpp entries));
 #endif
 
 /* Png_free_data() will turn off the "valid" flag for anything it frees.
@@ -2513,11 +2513,11 @@
                         png_voidp params));
 #endif
 
-PNG_EXPORT(png_charp,png_get_copyright) PNGARG((const_png_structp png_ptr));
-PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((const_png_structp png_ptr));
-PNG_EXPORT(png_charp,png_get_header_version) PNGARG((const_png_structp
+PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_const_structp png_ptr));
+PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_const_structp png_ptr));
+PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_const_structp
     png_ptr));
-PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((const_png_structp png_ptr));
+PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_const_structp png_ptr));
 
 #ifdef PNG_MNG_FEATURES_SUPPORTED
 PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp
@@ -2542,48 +2542,48 @@
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
 PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp
    png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max));
-PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((const_png_structp
+PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((png_const_structp
    png_ptr));
-PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((const_png_structp
+PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_const_structp
    png_ptr));
 /* Added in libpng-1.4.0 */
 PNG_EXPORT(void,png_set_chunk_cache_max) PNGARG((png_structp
    png_ptr, png_uint_32 user_chunk_cache_max));
 PNG_EXPORT(png_uint_32,png_get_chunk_cache_max)
-   PNGARG((const_png_structp png_ptr));
+   PNGARG((png_const_structp png_ptr));
 /* Added in libpng-1.4.1 */
 PNG_EXPORT(void,png_set_chunk_malloc_max) PNGARG((png_structp
    png_ptr, png_alloc_size_t user_chunk_cache_max));
 PNG_EXPORT(png_alloc_size_t,png_get_chunk_malloc_max)
-   PNGARG((const_png_structp png_ptr));
+   PNGARG((png_const_structp png_ptr));
 #endif
 
 #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
 PNG_EXPORT(png_uint_32,png_get_pixels_per_inch)
-   PNGARG((const_png_structp png_ptr, const_png_infop info_ptr));
+   PNGARG((png_const_structp png_ptr, png_const_infop info_ptr));
 
 PNG_EXPORT(png_uint_32,png_get_x_pixels_per_inch)
-   PNGARG((const_png_structp png_ptr, const_png_infop info_ptr));
+   PNGARG((png_const_structp png_ptr, png_const_infop info_ptr));
 
 PNG_EXPORT(png_uint_32,png_get_y_pixels_per_inch)
-   PNGARG((const_png_structp png_ptr, const_png_infop info_ptr));
+   PNGARG((png_const_structp png_ptr, png_const_infop info_ptr));
 
-PNG_EXPORT(float,png_get_x_offset_inches) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr));
+PNG_EXPORT(float,png_get_x_offset_inches) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr));
 
-PNG_EXPORT(float,png_get_y_offset_inches) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr));
+PNG_EXPORT(float,png_get_y_offset_inches) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr));
 
 #ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_pHYs_dpi) PNGARG((const_png_structp png_ptr,
-   const_png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
+PNG_EXPORT(png_uint_32,png_get_pHYs_dpi) PNGARG((png_const_structp png_ptr,
+   png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
    int *unit_type));
 #endif /* PNG_pHYs_SUPPORTED */
 #endif  /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
 
 /* Added in libpng-1.4.0 */
 #ifdef PNG_IO_STATE_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_io_state) PNGARG((const_png_structp png_ptr));
+PNG_EXPORT(png_uint_32,png_get_io_state) PNGARG((png_const_structp png_ptr));
 
 PNG_EXPORT(png_bytep,png_get_io_chunk_name)
    PNGARG((png_structp png_ptr));
diff --git a/pngconf.h b/pngconf.h
index ef32d6f..7ac00c3 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.4.6beta04 - January 22, 2011
+ * libpng version 1.4.6beta05 - January 23, 2011
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1380,14 +1380,14 @@
 #    ifndef PNG_ALLOCATED
 #      define PNG_ALLOCATED  __attribute__((__malloc__))
 #    endif
+#    ifndef PNG_DEPRECATED
+#      define PNG_DEPRECATED __attribute__((__deprecated__))
+#    endif
 
     /* This specifically protects structure members that should only be
      * accessed from within the library, therefore should be empty during
      * a library build.
      */
-#    ifndef PNG_DEPRECATED
-#      define PNG_DEPRECATED __attribute__((__deprecated__))
-#    endif
 #    ifndef PNG_DEPSTRUCT
 #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))
 #    endif
diff --git a/pngerror.c b/pngerror.c
index 64d964f..aede2fd 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.4.6 [January 22, 2011]
+ * Last changed in libpng 1.4.6 [January 23, 2011]
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -380,7 +380,7 @@
  * pointer before png_write_destroy and png_read_destroy are called.
  */
 png_voidp PNGAPI
-png_get_error_ptr(const_png_structp png_ptr)
+png_get_error_ptr(png_const_structp png_ptr)
 {
    if (png_ptr == NULL)
       return NULL;
diff --git a/pngget.c b/pngget.c
index 6286eea..fb019a9 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.4.6 [January 22, 2011]
+ * Last changed in libpng 1.4.6 [January 23, 2011]
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -18,7 +18,7 @@
 #include "pngpriv.h"
 
 png_uint_32 PNGAPI
-png_get_valid(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr,
     png_uint_32 flag)
 {
    if (png_ptr != NULL && info_ptr != NULL)
@@ -29,7 +29,7 @@
 }
 
 png_size_t PNGAPI
-png_get_rowbytes(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return(info_ptr->rowbytes);
@@ -40,7 +40,7 @@
 
 #ifdef PNG_INFO_IMAGE_SUPPORTED
 png_bytepp PNGAPI
-png_get_rows(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return(info_ptr->row_pointers);
@@ -53,7 +53,7 @@
 #ifdef PNG_EASY_ACCESS_SUPPORTED
 /* Easy access to info, added in libpng-0.99 */
 png_uint_32 PNGAPI
-png_get_image_width(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->width;
@@ -62,7 +62,7 @@
 }
 
 png_uint_32 PNGAPI
-png_get_image_height(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->height;
@@ -71,7 +71,7 @@
 }
 
 png_byte PNGAPI
-png_get_bit_depth(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->bit_depth;
@@ -80,7 +80,7 @@
 }
 
 png_byte PNGAPI
-png_get_color_type(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->color_type;
@@ -89,7 +89,7 @@
 }
 
 png_byte PNGAPI
-png_get_filter_type(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->filter_type;
@@ -98,7 +98,7 @@
 }
 
 png_byte PNGAPI
-png_get_interlace_type(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->interlace_type;
@@ -107,7 +107,7 @@
 }
 
 png_byte PNGAPI
-png_get_compression_type(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->compression_type;
@@ -116,7 +116,7 @@
 }
 
 png_uint_32 PNGAPI
-png_get_x_pixels_per_meter(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
 #ifdef PNG_pHYs_SUPPORTED
@@ -137,7 +137,7 @@
 }
 
 png_uint_32 PNGAPI
-png_get_y_pixels_per_meter(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
 #ifdef PNG_pHYs_SUPPORTED
@@ -158,7 +158,7 @@
 }
 
 png_uint_32 PNGAPI
-png_get_pixels_per_meter(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
 #ifdef PNG_pHYs_SUPPORTED
@@ -181,7 +181,7 @@
 
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 float PNGAPI
-png_get_pixel_aspect_ratio(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr)
    {
    if (png_ptr != NULL && info_ptr != NULL)
 #ifdef PNG_pHYs_SUPPORTED
@@ -205,7 +205,7 @@
 #endif
 
 png_int_32 PNGAPI
-png_get_x_offset_microns(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
 #ifdef PNG_oFFs_SUPPORTED
@@ -227,7 +227,7 @@
 }
 
 png_int_32 PNGAPI
-png_get_y_offset_microns(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
 
@@ -249,7 +249,7 @@
 }
 
 png_int_32 PNGAPI
-png_get_x_offset_pixels(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
 
@@ -271,7 +271,7 @@
 }
 
 png_int_32 PNGAPI
-png_get_y_offset_pixels(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
 
@@ -294,35 +294,35 @@
 
 #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
 png_uint_32 PNGAPI
-png_get_pixels_per_inch(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
      *.0254 +.5));
 }
 
 png_uint_32 PNGAPI
-png_get_x_pixels_per_inch(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
      *.0254 +.5));
 }
 
 png_uint_32 PNGAPI
-png_get_y_pixels_per_inch(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
      *.0254 +.5));
 }
 
 float PNGAPI
-png_get_x_offset_inches(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
      *.00003937);
 }
 
 float PNGAPI
-png_get_y_offset_inches(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
      *.00003937);
@@ -330,7 +330,7 @@
 
 #ifdef PNG_pHYs_SUPPORTED
 png_uint_32 PNGAPI
-png_get_pHYs_dpi(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr,
    png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
 {
    png_uint_32 retval = 0;
@@ -370,7 +370,7 @@
 #endif  /* PNG_EASY_ACCESS_SUPPORTED */
 
 png_byte PNGAPI
-png_get_channels(const_png_structp png_ptr, const_png_infop info_ptr)
+png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return(info_ptr->channels);
@@ -379,7 +379,7 @@
 }
 
 png_bytep PNGAPI
-png_get_signature(const_png_structp png_ptr, png_infop info_ptr)
+png_get_signature(png_const_structp png_ptr, png_infop info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
       return(info_ptr->signature);
@@ -389,7 +389,7 @@
 
 #ifdef PNG_bKGD_SUPPORTED
 png_uint_32 PNGAPI
-png_get_bKGD(const_png_structp png_ptr, png_infop info_ptr,
+png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr,
    png_color_16p *background)
 {
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
@@ -407,7 +407,7 @@
 #ifdef PNG_cHRM_SUPPORTED
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_cHRM(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr,
    double *white_x, double *white_y, double *red_x, double *red_y,
    double *green_x, double *green_y, double *blue_x, double *blue_y)
 {
@@ -438,7 +438,7 @@
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_cHRM_fixed(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
    png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
    png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
    png_fixed_point *blue_x, png_fixed_point *blue_y)
@@ -473,7 +473,7 @@
 #ifdef PNG_gAMA_SUPPORTED
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_gAMA(const_png_structp png_ptr, const_png_infop info_ptr, double *file_gamma)
+png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr, double *file_gamma)
 {
    png_debug1(1, "in %s retrieval function", "gAMA");
 
@@ -488,7 +488,7 @@
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_gAMA_fixed(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
     png_fixed_point *int_file_gamma)
 {
    png_debug1(1, "in %s retrieval function", "gAMA");
@@ -506,7 +506,7 @@
 
 #ifdef PNG_sRGB_SUPPORTED
 png_uint_32 PNGAPI
-png_get_sRGB(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr,
     int *file_srgb_intent)
 {
    png_debug1(1, "in %s retrieval function", "sRGB");
@@ -523,7 +523,7 @@
 
 #ifdef PNG_iCCP_SUPPORTED
 png_uint_32 PNGAPI
-png_get_iCCP(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr,
              png_charpp name, int *compression_type,
              png_charpp profile, png_uint_32 *proflen)
 {
@@ -547,7 +547,7 @@
 
 #ifdef PNG_sPLT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_sPLT(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr,
              png_sPLT_tpp spalettes)
 {
    if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
@@ -561,7 +561,7 @@
 
 #ifdef PNG_hIST_SUPPORTED
 png_uint_32 PNGAPI
-png_get_hIST(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr,
     png_uint_16p *hist)
 {
    png_debug1(1, "in %s retrieval function", "hIST");
@@ -617,7 +617,7 @@
 
 #ifdef PNG_oFFs_SUPPORTED
 png_uint_32 PNGAPI
-png_get_oFFs(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr,
    png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
 {
    png_debug1(1, "in %s retrieval function", "oFFs");
@@ -636,7 +636,7 @@
 
 #ifdef PNG_pCAL_SUPPORTED
 png_uint_32 PNGAPI
-png_get_pCAL(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr,
    png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
    png_charp *units, png_charpp *params)
 {
@@ -662,7 +662,7 @@
 #ifdef PNG_sCAL_SUPPORTED
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_sCAL(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr,
              int *unit, double *width, double *height)
 {
     if (png_ptr != NULL && info_ptr != NULL &&
@@ -678,7 +678,7 @@
 #else
 #ifdef PNG_FIXED_POINT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_sCAL_s(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr,
              int *unit, png_charpp width, png_charpp height)
 {
     if (png_ptr != NULL && info_ptr != NULL &&
@@ -697,7 +697,7 @@
 
 #ifdef PNG_pHYs_SUPPORTED
 png_uint_32 PNGAPI
-png_get_pHYs(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr,
    png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
 {
    png_uint_32 retval = 0;
@@ -730,7 +730,7 @@
 #endif
 
 png_uint_32 PNGAPI
-png_get_PLTE(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr,
     png_colorp *palette,
    int *num_palette)
 {
@@ -749,7 +749,7 @@
 
 #ifdef PNG_sBIT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_sBIT(const_png_structp png_ptr, png_infop info_ptr,
+png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr,
     png_color_8p *sig_bit)
 {
    png_debug1(1, "in %s retrieval function", "sBIT");
@@ -766,7 +766,7 @@
 
 #ifdef PNG_TEXT_SUPPORTED
 png_uint_32 PNGAPI
-png_get_text(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_text(png_const_structp png_ptr, png_const_infop info_ptr,
     png_textp *text_ptr, int *num_text)
 {
    if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
@@ -791,7 +791,7 @@
 
 #ifdef PNG_tIME_SUPPORTED
 png_uint_32 PNGAPI
-png_get_tIME(const_png_structp png_ptr, png_infop info_ptr,
+png_get_tIME(png_const_structp png_ptr, png_infop info_ptr,
     png_timep *mod_time)
 {
    png_debug1(1, "in %s retrieval function", "tIME");
@@ -808,7 +808,7 @@
 
 #ifdef PNG_tRNS_SUPPORTED
 png_uint_32 PNGAPI
-png_get_tRNS(const_png_structp png_ptr, png_infop info_ptr,
+png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr,
    png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
 {
    png_uint_32 retval = 0;
@@ -850,7 +850,7 @@
 
 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
 png_uint_32 PNGAPI
-png_get_unknown_chunks(const_png_structp png_ptr, const_png_infop info_ptr,
+png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr,
              png_unknown_chunkpp unknowns)
 {
    if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
@@ -864,7 +864,7 @@
 
 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
 png_byte PNGAPI
-png_get_rgb_to_gray_status(const_png_structp png_ptr)
+png_get_rgb_to_gray_status(png_const_structp png_ptr)
 {
    return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
 }
@@ -872,14 +872,14 @@
 
 #ifdef PNG_USER_CHUNKS_SUPPORTED
 png_voidp PNGAPI
-png_get_user_chunk_ptr(const_png_structp png_ptr)
+png_get_user_chunk_ptr(png_const_structp png_ptr)
 {
    return (png_ptr? png_ptr->user_chunk_ptr : NULL);
 }
 #endif
 
 png_size_t PNGAPI
-png_get_compression_buffer_size(const_png_structp png_ptr)
+png_get_compression_buffer_size(png_const_structp png_ptr)
 {
    return (png_ptr ? png_ptr->zbuf_size : 0L);
 }
@@ -889,24 +889,24 @@
 /* These functions were added to libpng 1.2.6 and were enabled
  * by default in libpng-1.4.0 */
 png_uint_32 PNGAPI
-png_get_user_width_max(const_png_structp png_ptr)
+png_get_user_width_max(png_const_structp png_ptr)
 {
     return (png_ptr? png_ptr->user_width_max : 0);
 }
 png_uint_32 PNGAPI
-png_get_user_height_max(const_png_structp png_ptr)
+png_get_user_height_max(png_const_structp png_ptr)
 {
     return (png_ptr? png_ptr->user_height_max : 0);
 }
 /* This function was added to libpng 1.4.0 */
 png_uint_32 PNGAPI
-png_get_chunk_cache_max(const_png_structp png_ptr)
+png_get_chunk_cache_max(png_const_structp png_ptr)
 {
     return (png_ptr? png_ptr->user_chunk_cache_max : 0);
 }
 /* This function was added to libpng 1.4.1 */
 png_alloc_size_t PNGAPI
-png_get_chunk_malloc_max(const_png_structp png_ptr)
+png_get_chunk_malloc_max(png_const_structp png_ptr)
 {
     return (png_ptr?
        png_ptr->user_chunk_malloc_max : 0);
@@ -916,7 +916,7 @@
 /* These functions were added to libpng 1.4.0 */
 #ifdef PNG_IO_STATE_SUPPORTED
 png_uint_32 PNGAPI
-png_get_io_state(const_png_structp png_ptr)
+png_get_io_state(png_const_structp png_ptr)
 {
     return png_ptr->io_state;
 }
diff --git a/pngmem.c b/pngmem.c
index e15946a..63b581c 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.4.6 [January 22, 2011]
+ * Last changed in libpng 1.4.6 [January 23, 2011]
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -601,7 +601,7 @@
  * pointer before png_write_destroy and png_read_destroy are called.
  */
 png_voidp PNGAPI
-png_get_mem_ptr(const_png_structp png_ptr)
+png_get_mem_ptr(png_const_structp png_ptr)
 {
    if (png_ptr == NULL)
       return (NULL);
diff --git a/pngpread.c b/pngpread.c
index 0b03d73..fa4d3b1 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.4.6 [January 22, 2011]
+ * Last changed in libpng 1.4.6 [January 23, 2011]
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -1757,7 +1757,7 @@
 }
 
 png_voidp PNGAPI
-png_get_progressive_ptr(const_png_structp png_ptr)
+png_get_progressive_ptr(png_const_structp png_ptr)
 {
    if (png_ptr == NULL)
       return (NULL);
diff --git a/pngpriv.h b/pngpriv.h
index 760c780..727ad2e 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
 
 /* pngpriv.h - private declarations for use inside libpng
  *
- * libpng version 1.4.6beta04 - January 22, 2011
+ * libpng version 1.4.6beta05 - January 23, 2011
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngrutil.c b/pngrutil.c
index b0c3491..646e1fc 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.4.6 [January 22, 2011]
+ * Last changed in libpng 1.4.6 [January 23, 2011]
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
diff --git a/pngtest.c b/pngtest.c
index 79d179d..18a8bec 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1687,4 +1687,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_4_6beta04 your_png_h_is_not_version_1_4_6beta04;
+typedef version_1_4_6beta05 your_png_h_is_not_version_1_4_6beta05;
diff --git a/pngtrans.c b/pngtrans.c
index 6b8508c..df17e88 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.4.6 [January 22, 2011]
+ * Last changed in libpng 1.4.6 [January 23, 2011]
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -662,7 +662,7 @@
  * are called.
  */
 png_voidp PNGAPI
-png_get_user_transform_ptr(const_png_structp png_ptr)
+png_get_user_transform_ptr(png_const_structp png_ptr)
 {
    if (png_ptr == NULL)
       return (NULL);
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 249305b..8444bc4 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.4.6beta04 - January 22, 2011
+libpng version 1.4.6beta05 - January 23, 2011
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index c2a7528..9bb250a 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source and build
  *
- * libpng version 1.4.6beta04 - January 22, 2011
+ * libpng version 1.4.6beta05 - January 23, 2011
  *
  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 721ff96..69acc45 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,8 +1,8 @@
 
-Makefiles for  libpng version 1.4.6beta04 - January 22, 2011
+Makefiles for  libpng version 1.4.6beta05 - January 23, 2011
 
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng14.so.14.1.4.6beta04)
+                       (gcc, creates libpng14.so.14.1.4.6beta05)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -20,7 +20,7 @@
  makefile.dec      =>  DEC Alpha UNIX makefile
  makefile.dj2      =>  DJGPP 2 makefile
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       (gcc, creates libpng14.so.14.1.4.6beta04)
+                       (gcc, creates libpng14.so.14.1.4.6beta05)
  makefile.freebsd  =>  FreeBSD makefile
  makefile.gcc      =>  Generic gcc makefile
  makefile.hpgcc    =>  HPUX makefile using gcc
@@ -36,12 +36,12 @@
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng14.so.14.1.4.6beta04)
+                       creates libpng14.so.14.1.4.6beta05)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng14.so.14.1.4.6beta04)
+                       creates libpng14.so.14.1.4.6beta05)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng14.so.14.1.4.6beta04)
+                       creates libpng14.so.14.1.4.6beta05)
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.sunos    =>  Sun makefile
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index 6831ef4..18cead6 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.4.6beta04
+version=1.4.6beta05
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index e5e2047..b229f4d 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.4.6beta04
+Version: 1.4.6beta05
 Libs: -L${libdir} -lpng14
 Cflags: -I${includedir}
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index b3f5cb3..a72c6d6 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png14
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.4.6beta04
+SHLIB_MINOR=	1.4.6beta05
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.netbsd b/scripts/makefile.netbsd
index d98a85c..e6bba5a 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.4.6beta04
+SHLIB_MINOR=	1.4.6beta05
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 62e6309..75fdbe3 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.4.6beta04
+SHLIB_MINOR=	1.4.6beta05
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/png32ce.def b/scripts/png32ce.def
index bccd8e9..4b07248 100644
--- a/scripts/png32ce.def
+++ b/scripts/png32ce.def
@@ -15,7 +15,7 @@
  png_get_int_32
 
 EXPORTS
-;Version 1.4.6beta04
+;Version 1.4.6beta05
   png_build_grayscale_palette  @1
 ;  png_check_sig        @2
   png_chunk_error      @3
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index 873cbaf..608a4d3 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.4.6beta04
+; Version 1.4.6beta05
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngwin.def b/scripts/pngwin.def
index 8c058eb..e11569c 100644
--- a/scripts/pngwin.def
+++ b/scripts/pngwin.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.4.6beta04
+;Version 1.4.6beta05
   png_build_grayscale_palette
   png_chunk_error
   png_chunk_warning