Imported from libpng-1.2.27beta03.tar
diff --git a/ANNOUNCE b/ANNOUNCE
index 9cb3ca0..472a73f 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.2.27beta02 - April 14, 2008
+Libpng 1.2.27beta03 - April 14, 2008
 
 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.
@@ -9,37 +9,37 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.2.27beta02.tar.gz
-   libpng-1.2.27beta02.tar.lzma
+   libpng-1.2.27beta03.tar.gz
+   libpng-1.2.27beta03.tar.lzma
      (Get the lzma codec from <http://tukaani.org/lzma>).
-   libpng-1.2.27beta02.tar.bz2
+   libpng-1.2.27beta03.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.2.27beta02-no-config.tar.gz
-   libpng-1.2.27beta02-no-config.tar.lzma
-   libpng-1.2.27beta02-no-config.tar.bz2
+   libpng-1.2.27beta03-no-config.tar.gz
+   libpng-1.2.27beta03-no-config.tar.lzma
+   libpng-1.2.27beta03-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1227b02.zip
-   lp1227b02.7z
-   lp1227b02.tar.bz2
+   lp1227b03.zip
+   lp1227b03.7z
+   lp1227b03.tar.bz2
 
 Project files
 
-   libpng-1.2.27beta02-project-netware.zip
-   libpng-1.2.27beta02-project-wince.zip
+   libpng-1.2.27beta03-project-netware.zip
+   libpng-1.2.27beta03-project-wince.zip
 
 Other information:
 
-   libpng-1.2.27beta02-README.txt
-   libpng-1.2.27beta02-KNOWNBUGS.txt
-   libpng-1.2.27beta02-LICENSE.txt
-   libpng-1.2.27beta02-Y2K-compliance.txt
-   libpng-1.2.27beta02-[previous version]-diff.txt
+   libpng-1.2.27beta03-README.txt
+   libpng-1.2.27beta03-KNOWNBUGS.txt
+   libpng-1.2.27beta03-LICENSE.txt
+   libpng-1.2.27beta03-Y2K-compliance.txt
+   libpng-1.2.27beta03-[previous version]-diff.txt
 
 Changes since the last public release (1.2.26):
 
@@ -51,10 +51,17 @@
   Reject tRNS chunk with out-of-range samples instead of masking off
     the invalid high bits as done in since libpng-1.2.19beta5.
 
-version 1.2.27rc01 [April 14, 2008]
+version 1.2.27beta02 [April 13, 2008]
   Revised documentation about unknown chunk and user chunk handling.
   Keep tRNS chunk with out-of-range samples and issue a png_warning().
 
+version 1.2.27beta03 [April 14, 2008]
+  Added check for NULL ptr in TURBOC version of png_free_default().
+  Removed several unnecessary checks for NULL before calling png_free().
+  Revised png_set_tRNS() so that calling it twice removes and invalidates
+    the previous call.
+  Revised pngtest to check for out-of-range tRNS samples.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
 (subscription required; visit 
diff --git a/CHANGES b/CHANGES
index a2d7122..32d5dce 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2111,10 +2111,17 @@
   Reject tRNS chunk with out-of-range samples instead of masking off
     the invalid high bits as done in since libpng-1.2.19beta5.
 
-version 1.2.27beta02 [April 14, 2008]
+version 1.2.27beta02 [April 13, 2008]
   Revised documentation about unknown chunk and user chunk handling.
   Keep tRNS chunk with out-of-range samples and issue a png_warning().
 
+version 1.2.27beta03 [April 14, 2008]
+  Added check for NULL ptr in TURBOC version of png_free_default().
+  Removed several unnecessary checks for NULL before calling png_free().
+  Revised png_set_tRNS() so that calling it twice removes and invalidates
+    the previous call.
+  Revised pngtest to check for out-of-range tRNS samples.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/INSTALL b/INSTALL
index 5c78138..0a0cdc0 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.2.27beta02 - April 14, 2008
+Installing libpng version 1.2.27beta03 - April 14, 2008
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -44,7 +44,7 @@
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.2.27beta02" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.2.27beta03" or "lpng109" and "zlib-1.2.1"
 or "zlib121") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -101,9 +101,9 @@
  CMakeLists.txt    =>  "cmake" script
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       gcc, creates libpng12.so.0.1.2.27beta02)
+                       gcc, creates libpng12.so.0.1.2.27beta03)
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng12.so.0.1.2.27beta02)
+                       (gcc, creates libpng12.so.0.1.2.27beta03)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -125,14 +125,14 @@
  makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng12.so.0.1.2.27beta02)
+                       creates libpng12.so.0.1.2.27beta03)
  makefile.sunos    =>  Sun makefile
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.27beta02)
+                       creates libpng12.so.0.1.2.27beta03)
  makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.27beta02)
+                       creates libpng12.so.0.1.2.27beta03)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng12.so.0.1.2.27beta02)
+                       creates libpng12.so.0.1.2.27beta03)
  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/KNOWNBUG b/KNOWNBUG
index c375835..6e4ebd0 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.2.27beta02
+Known bugs in libpng version 1.2.27beta03
 
 1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
diff --git a/LICENSE b/LICENSE
index ca567a0..c26b9f8 100644
--- a/LICENSE
+++ b/LICENSE
@@ -8,7 +8,7 @@
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.2.27beta02, April 14, 2008, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.27beta03, April 14, 2008, are
 Copyright (c) 2004, 2006-2008 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/README b/README
index aed645e..b09d305 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.2.27beta02 - April 14, 2008 (shared library 12.0)
+README for libpng version 1.2.27beta03 - April 14, 2008 (shared library 12.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -191,11 +191,11 @@
        descrip.mms      =>  VMS makefile for MMS or MMK
        makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            gcc, creates libpng12.so.0.1.2.27beta02)
+                            gcc, creates libpng12.so.0.1.2.27beta03)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta02)
+                            (gcc, creates libpng12.so.0.1.2.27beta03)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta02,
+                            (gcc, creates libpng12.so.0.1.2.27beta03,
                             uses assembler code tuned for Intel MMX platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
@@ -217,12 +217,12 @@
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng12.so.0.1.2.27beta02)
+                            (gcc, creates libpng12.so.0.1.2.27beta03)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta02)
+                            (gcc, creates libpng12.so.0.1.2.27beta03)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta02)
+                            (gcc, creates libpng12.so.0.1.2.27beta03)
        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/Y2KINFO b/Y2KINFO
index 53a1ac5..19eb643 100644
--- a/Y2KINFO
+++ b/Y2KINFO
@@ -7,7 +7,7 @@
       an official declaration.
 
       This is your unofficial assurance that libpng from version 0.71 and
-      upward through 1.2.27beta02 are Y2K compliant.  It is my belief that earlier
+      upward through 1.2.27beta03 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
diff --git a/configure b/configure
index 9f3df3a..d0c5fd1 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.61 for libpng 1.2.27beta02.
+# Generated by GNU Autoconf 2.61 for libpng 1.2.27beta03.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -728,8 +728,8 @@
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.2.27beta02'
-PACKAGE_STRING='libpng 1.2.27beta02'
+PACKAGE_VERSION='1.2.27beta03'
+PACKAGE_STRING='libpng 1.2.27beta03'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 
 ac_unique_file="pngget.c"
@@ -1406,7 +1406,7 @@
   # 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 1.2.27beta02 to adapt to many kinds of systems.
+\`configure' configures libpng 1.2.27beta03 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1476,7 +1476,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.2.27beta02:";;
+     short | recursive ) echo "Configuration of libpng 1.2.27beta03:";;
    esac
   cat <<\_ACEOF
 
@@ -1586,7 +1586,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.2.27beta02
+libpng configure 1.2.27beta03
 generated by GNU Autoconf 2.61
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1600,7 +1600,7 @@
 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 1.2.27beta02, which was
+It was created by libpng $as_me 1.2.27beta03, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   $ $0 $@
@@ -2270,7 +2270,7 @@
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.2.27beta02'
+ VERSION='1.2.27beta03'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2441,7 +2441,7 @@
 
 
 
-PNGLIB_VERSION=1.2.27beta02
+PNGLIB_VERSION=1.2.27beta03
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
 PNGLIB_RELEASE=27
@@ -21295,7 +21295,7 @@
 # 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 1.2.27beta02, which was
+This file was extended by libpng $as_me 1.2.27beta03, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -21348,7 +21348,7 @@
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF
 ac_cs_version="\\
-libpng config.status 1.2.27beta02
+libpng config.status 1.2.27beta03
 configured by $0, generated by GNU Autoconf 2.61,
   with options \\"`echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 
diff --git a/configure.ac b/configure.ac
index 28010f4..067be78 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,12 +18,12 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.2.27beta02], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.2.27beta03], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.2.27beta02
+PNGLIB_VERSION=1.2.27beta03
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
 PNGLIB_RELEASE=27
diff --git a/libpng-1.2.27beta02.txt b/libpng-1.2.27beta03.txt
similarity index 99%
rename from libpng-1.2.27beta02.txt
rename to libpng-1.2.27beta03.txt
index 0d1c611..0d65270 100644
--- a/libpng-1.2.27beta02.txt
+++ b/libpng-1.2.27beta03.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.27beta02 - April 14, 2008
+ libpng version 1.2.27beta03 - April 14, 2008
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
@@ -2438,6 +2438,9 @@
 function will normally call png_error() if it receives a NULL from the
 system memory allocator or from your replacement malloc_fn().
 
+Your free_fn() will never be called with a NULL ptr, since libpng's
+png_free() checks for NULL before calling free_fn().
+
 Input/Output in libpng is done through png_read() and png_write(),
 which currently just call fread() and fwrite().  The FILE * is stored in
 png_struct and is initialized via png_init_io().  If you wish to change
@@ -2849,7 +2852,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.27beta02 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.27beta03 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 1bbeda4..481dbf5 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
 .TH LIBPNG 3 "April 14, 2008"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27beta02
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27beta03
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -410,7 +410,7 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.27beta02 - April 14, 2008
+ libpng version 1.2.27beta03 - April 14, 2008
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
@@ -2848,6 +2848,9 @@
 function will normally call png_error() if it receives a NULL from the
 system memory allocator or from your replacement malloc_fn().
 
+Your free_fn() will never be called with a NULL ptr, since libpng's
+png_free() checks for NULL before calling free_fn().
+
 Input/Output in libpng is done through png_read() and png_write(),
 which currently just call fread() and fwrite().  The FILE * is stored in
 png_struct and is initialized via png_init_io().  If you wish to change
@@ -3259,7 +3262,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.27beta02 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.27beta03 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
@@ -3481,7 +3484,7 @@
  1.2.26rc01          13    10226  12.so.0.26[.0]
  1.2.26              13    10226  12.so.0.26[.0]
  1.0.32              10    10032  10.so.0.32[.0]
- 1.2.27beta01-02     13    10227  12.so.0.27[.0]
+ 1.2.27beta01-03     13    10227  12.so.0.27[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -3537,7 +3540,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.2.27beta02 - April 14, 2008:
+Libpng version 1.2.27beta03 - April 14, 2008:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -3558,7 +3561,7 @@
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.2.27beta02, April 14, 2008, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.27beta03, April 14, 2008, are
 Copyright (c) 2004,2006-2008 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 a6a1052..f0a0ae7 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
 .TH LIBPNGPF 3 "April 14, 2008"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27beta02
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27beta03
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/png.c b/png.c
index c849c0d..5e952dc 100644
--- a/png.c
+++ b/png.c
@@ -13,7 +13,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_27beta02 Your_png_h_is_not_version_1_2_27beta02;
+typedef version_1_2_27beta03 Your_png_h_is_not_version_1_2_27beta03;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
@@ -693,7 +693,7 @@
 png_get_copyright(png_structp png_ptr)
 {
    png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
-   return ((png_charp) "\n libpng version 1.2.27beta02 - April 14, 2008\n\
+   return ((png_charp) "\n libpng version 1.2.27beta03 - April 14, 2008\n\
    Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\
    Copyright (c) 1996-1997 Andreas Dilger\n\
    Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
diff --git a/png.h b/png.h
index 3c5fc2d..2aa5a05 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.27beta02 - April 14, 2008
+ * libpng version 1.2.27beta03 - April 14, 2008
  * Copyright (c) 1998-2008 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.)
@@ -9,7 +9,7 @@
  * 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 1.2.27beta02 - April 14, 2008: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.27beta03 - April 14, 2008: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -183,7 +183,7 @@
  *    1.2.26rc01              13    10226  12.so.0.26[.0]
  *    1.2.26                  13    10226  12.so.0.26[.0]
  *    1.0.32                  10    10032  10.so.0.32[.0]
- *    1.2.27beta01-02         13    10227  12.so.0.27[.0]
+ *    1.2.27beta01-03         13    10227  12.so.0.27[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -213,7 +213,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.2.27beta02, April 14, 2008, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.2.27beta03, April 14, 2008, are
  * Copyright (c) 2004, 2006-2008 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:
@@ -331,7 +331,7 @@
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.2.27beta02 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.27beta03 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
@@ -387,9 +387,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.27beta02"
+#define PNG_LIBPNG_VER_STRING "1.2.27beta03"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.27beta02 - April 14, 2008\n"
+   " libpng version 1.2.27beta03 - April 14, 2008\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  13
@@ -401,7 +401,7 @@
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  02
+#define PNG_LIBPNG_VER_BUILD  03
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -1442,7 +1442,7 @@
 /* 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_2_27beta02;
+typedef png_structp version_1_2_27beta03;
 
 typedef png_struct FAR * FAR * png_structpp;
 
diff --git a/pngconf.h b/pngconf.h
index c60bb52..cfbafff 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.2.27beta02 - April 14, 2008
+ * libpng version 1.2.27beta03 - April 14, 2008
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngmem.c b/pngmem.c
index c376e4b..cb966b1 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.2.26 [April 2, 2008]
+ * Last changed in libpng 1.2.27 [April 14, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -293,7 +293,7 @@
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
 
-   if(png_ptr == NULL) return;
+   if(png_ptr == NULL || ptr == NULL) return;
 
    if (png_ptr->offset_table != NULL)
    {
diff --git a/pngpread.c b/pngpread.c
index d3d8933..78ccd36 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1532,11 +1532,8 @@
       else
 #endif
         png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
-      if (png_ptr->unknown_chunk.data)
-      {
-        png_free(png_ptr, png_ptr->unknown_chunk.data);
-        png_ptr->unknown_chunk.data = NULL;
-      }
+      png_free(png_ptr, png_ptr->unknown_chunk.data);
+      png_ptr->unknown_chunk.data = NULL;
    }
    else
 #endif
diff --git a/pngrtran.c b/pngrtran.c
index 2d2b98b..59c88db 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.2.25 [February 18, 2008]
+ * Last changed in libpng 1.2.27 [April 14, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngrutil.c b/pngrutil.c
index 4f48098..2422d66 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -2250,12 +2250,9 @@
        }
        else
 #endif
-         png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
-       if (png_ptr->unknown_chunk.data)
-       {
-         png_free(png_ptr, png_ptr->unknown_chunk.data);
-         png_ptr->unknown_chunk.data = NULL;
-       }
+       png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
+       png_free(png_ptr, png_ptr->unknown_chunk.data);
+       png_ptr->unknown_chunk.data = NULL;
    }
    else
 #endif
@@ -3151,8 +3148,7 @@
 
    if(row_bytes + 64 > png_ptr->old_big_row_buf_size)
    {
-     if (png_ptr->big_row_buf)
-        png_free(png_ptr,png_ptr->big_row_buf);
+     png_free(png_ptr,png_ptr->big_row_buf);
      png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
      png_ptr->row_buf = png_ptr->big_row_buf+32;
      png_ptr->old_big_row_buf_size = row_bytes+64;
@@ -3167,8 +3163,7 @@
 
    if(png_ptr->rowbytes+1 > png_ptr->old_prev_row_size)
    {
-     if (png_ptr->prev_row)
-        png_free(png_ptr,png_ptr->prev_row);
+     png_free(png_ptr,png_ptr->prev_row);
      png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
         png_ptr->rowbytes + 1));
      png_ptr->old_prev_row_size = png_ptr->rowbytes+1;
diff --git a/pngset.c b/pngset.c
index 496bb52..40f67b1 100644
--- a/pngset.c
+++ b/pngset.c
@@ -914,6 +914,8 @@
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
+   png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
+
    if (trans != NULL)
    {
        /*
@@ -921,19 +923,12 @@
         * we do it for backward compatibility with the way the png_handle_tRNS
         * function used to do the allocation.
         */
-#ifdef PNG_FREE_ME_SUPPORTED
-       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
-#endif
+
        /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
        png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
            (png_uint_32)PNG_MAX_PALETTE_LENGTH);
-       if (num_trans <= PNG_MAX_PALETTE_LENGTH)
+       if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
          png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
-#ifdef PNG_FREE_ME_SUPPORTED
-       info_ptr->free_me |= PNG_FREE_TRNS;
-#else
-       png_ptr->flags |= PNG_FLAG_FREE_TRNS;
-#endif
    }
 
    if (trans_values != NULL)
@@ -945,17 +940,24 @@
           ((int)trans_values->red > sample_max ||
           (int)trans_values->green > sample_max ||
           (int)trans_values->blue > sample_max)))
-         {
-            png_warning(png_ptr,
-              "tRNS chunk has out-of-range samples for bit_depth");
-          }
+        png_warning(png_ptr,
+           "tRNS chunk has out-of-range samples for bit_depth");
       png_memcpy(&(info_ptr->trans_values), trans_values,
          png_sizeof(png_color_16));
       if (num_trans == 0)
         num_trans = 1;
    }
+
    info_ptr->num_trans = (png_uint_16)num_trans;
-   info_ptr->valid |= PNG_INFO_tRNS;
+   if (num_trans != 0)
+   {
+      info_ptr->valid |= PNG_INFO_tRNS;
+#ifdef PNG_FREE_ME_SUPPORTED
+      info_ptr->free_me |= PNG_FREE_TRNS;
+#else
+      png_ptr->flags |= PNG_FLAG_FREE_TRNS;
+#endif
+   }
 }
 #endif
 
@@ -1207,8 +1209,7 @@
 {
     if (png_ptr == NULL)
        return;
-    if(png_ptr->zbuf)
-       png_free(png_ptr, png_ptr->zbuf);
+    png_free(png_ptr, png_ptr->zbuf);
     png_ptr->zbuf_size = (png_size_t)size;
     png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
     png_ptr->zstream.next_out = png_ptr->zbuf;
diff --git a/pngtest.c b/pngtest.c
index 61f4106..a9ef6b6 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,9 +1,9 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.2.23 - [November 6, 2007]
+ * Last changed in libpng 1.2.27 - [April 14, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2007 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -689,8 +689,7 @@
 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
-      if (row_buf)
-         png_free(read_ptr, row_buf);
+      png_free(read_ptr, row_buf);
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
 #ifdef PNG_WRITE_SUPPORTED
       png_destroy_info_struct(write_ptr, &write_end_info_ptr);
@@ -1024,8 +1023,16 @@
       if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans,
          &trans_values))
       {
-         png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
-            trans_values);
+         int sample_max = (1 << read_info_ptr->bit_depth);
+         /* libpng doesn't reject a tRNS chunk with out-of-range samples */
+         if (!((read_info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
+            (int)trans_values->gray > sample_max) ||
+            (read_info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
+            ((int)trans_values->red > sample_max ||
+            (int)trans_values->green > sample_max ||
+            (int)trans_values->blue > sample_max))))
+           png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
+              trans_values);
       }
    }
 #endif
@@ -1553,4 +1560,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_27beta02 your_png_h_is_not_version_1_2_27beta02;
+typedef version_1_2_27beta03 your_png_h_is_not_version_1_2_27beta03;
diff --git a/pngwutil.c b/pngwutil.c
index 1f978ec..41aa399 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.26 [April 2, 2008]
+ * Last changed in libpng 1.2.27 [April 14, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1516,8 +1516,7 @@
 
    png_write_chunk_end(png_ptr);
    png_free(png_ptr, new_key);
-   if (new_lang)
-     png_free(png_ptr, new_lang);
+   png_free(png_ptr, new_lang);
 }
 #endif
 
diff --git a/scripts/CMakeLists.txt b/scripts/CMakeLists.txt
index e5d8d99..a2e098f 100644
--- a/scripts/CMakeLists.txt
+++ b/scripts/CMakeLists.txt
@@ -169,7 +169,7 @@
 
 # SET UP LINKS
 set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#    VERSION 0.${PNGLIB_RELEASE}.1.2.27beta02
+#    VERSION 0.${PNGLIB_RELEASE}.1.2.27beta03
      VERSION 0.${PNGLIB_RELEASE}.0
      SOVERSION 0
      CLEAN_DIRECT_OUTPUT 1)
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index 282f7cb..319809a 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -8,7 +8,7 @@
 
 # Modeled after libxml-config.
 
-version=1.2.27beta02
+version=1.2.27beta03
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc-configure.in b/scripts/libpng.pc-configure.in
index ab8c94f..2c8445f 100644
--- a/scripts/libpng.pc-configure.in
+++ b/scripts/libpng.pc-configure.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.27beta02
+Version: 1.2.27beta03
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir} @LIBPNG_NO_MMX@
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index e1b5feb..9b6cf02 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.27beta02
+Version: 1.2.27beta03
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index fe952de..0c6c73e 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index 28c05d2..8ae9bae 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index ff07b40..13559ab 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -20,7 +20,7 @@
 
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index 7422257..e38469d 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index 8ed2e83..ac9bb28 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -74,7 +74,7 @@
 LIBNAME = libpng12
 PNGMAJ = 0
 CYGDLL = 12
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index f4daa9e..8155133 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -19,7 +19,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index afc9b9d..c5abe7c 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -5,7 +5,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index 0a70c87..0eebde7 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index a45c59b..8b8cae4 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -14,7 +14,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index 3df81ec..f012045 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -18,7 +18,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index 6d25c63..cccb171 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index 07d4858..e67fdf4 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -18,7 +18,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index a785058..bf59039 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index 0e01041..99bc3d4 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -74,7 +74,7 @@
 LIBNAME = libpng12
 PNGMAJ = 0
 MINGDLL = 12
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index b8a3b2c..fd785f2 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -14,7 +14,7 @@
 
 LIB=	png12
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.27beta02
+SHLIB_MINOR=	1.2.27beta03
 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 0b0ac94..2c793fd 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -14,7 +14,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.2.27beta02
+SHLIB_MINOR=	1.2.27beta03
 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.nommx b/scripts/makefile.nommx
index 994e58a..ba52336 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -7,7 +7,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 9fbbbbe..67ddfc0 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -8,7 +8,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.27beta02
+SHLIB_MINOR=	1.2.27beta03
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index 5085c2c..a9d4649 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index 59ec663..ce666af 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index a253dbf..21b94af 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index 000a492..63516fa 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index b4b34d7..66788d6 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.solaris-x86 b/scripts/makefile.solaris-x86
index 4524bc2..16f6925 100644
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta02
+PNGMIN = 1.2.27beta03
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index 574467e..d937577 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.2.27beta02
+; Version 1.2.27beta03
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngw32.def b/scripts/pngw32.def
index 8aef024..967557f 100644
--- a/scripts/pngw32.def
+++ b/scripts/pngw32.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.2.27beta02
+;Version 1.2.27beta03
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3