diff --git a/ANNOUNCE b/ANNOUNCE
index 8d63710..4339355 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.0.47 - July 16, 2009
+Libpng 1.0.48 - August 13, 2009
 
 This is a public release of libpng, intended for use in production codes.
 
@@ -8,54 +8,52 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.0.47.tar.gz
-   libpng-1.0.47.tar.lzma
-     (Get the lzma codec from <http://tukaani.org/lzma>).
-   libpng-1.0.47.tar.bz2
+   libpng-1.0.48.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.48.tar.gz
+   libpng-1.0.48.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.0.47-no-config.tar.gz
-   libpng-1.0.47-no-config.tar.lzma
-   libpng-1.0.47-no-config.tar.bz2
+   libpng-1.0.48-no-config.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.48-no-config.tar.gz
+   libpng-1.0.48-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1047.zip
-   lpng1047.7z
-   lpng1047.tar.bz2
+   lpng1048.zip
+   lpng1048.7z
+   lpng1048.tar.bz2
 
 Project files
 
-   libpng-1.0.47-project-netware.zip
-   libpng-1.0.47-project-wince.zip
+   libpng-1.0.48-project-netware.zip
+   libpng-1.0.48-project-wince.zip
 
 Other information:
 
-   libpng-1.0.47-README.txt
-   libpng-1.0.47-KNOWNBUGS.txt
-   libpng-1.0.47-LICENSE.txt
-   libpng-1.0.47-Y2K-compliance.txt
+   libpng-1.0.48-README.txt
+   libpng-1.0.48-KNOWNBUGS.txt
+   libpng-1.0.48-LICENSE.txt
+   libpng-1.0.48-Y2K-compliance.txt
 
-Changes since the last public release (1.0.46):
+Changes since the last public release (1.0.47):
 
-version 1.0.47 [July 16, 2009]
+version 1.0.48 [August 13, 2009]
 
-  Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
-    multiple times and to specify the sample order in the tRNS chunk,
-    because the ISO PNG specification has a typo in the tRNS table.
-  Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
-    PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
-    available for ignoring known chunks even when not saving unknown chunks.
-  Added PNG_NO_HANDLE_AS_UNKNOWN in the PNG_LEGACY_SUPPORTED block of
-    pngconf.h, and moved the various unknown chunk macro definitions
-    outside of the PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
-  Added a reference to the libpng license in each source file.
-  Rebuilt configure scripts with autoconf-2.63.
+  Added a prototype for png_64bit_product() in png.h
+  Expanded the information about prototypes in the libpng style section of
+    the documentation.
+  Rebuilt configure scripts with autoconf-2.64.
+  Avoid a possible NULL dereference in debug build, in png_set_text_2().
+    (bug introduced in libpng-0.95, discovered by Evan Rouault)
+  Replaced *.tar.lzma with *.tar.xz in distribution.  Get the xz codec
+    from <http://tukaani.org/xz>.
+  Reject attempt to write iCCP chunk with negative embedded profile length
+    (JD Chen)
 
-
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 7cc216d..9a8bbed 100644
--- a/CHANGES
+++ b/CHANGES
@@ -539,7 +539,8 @@
   Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
   Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
     to applications a macro "PNG_USE_LOCAL_ARRAYS".
-  #ifdef out all the new declarations when PNG_USE_GLOBAL_ARRAYS is defined.
+  Remove all the new declarations with #ifdef/#endif when
+    PNG_USE_GLOBAL_ARRAYS is defined.
   Added PNG_EXPORT_VAR macro to accommodate making DLL's.
 version 1.0.5e [November 30, 1999]
   Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
@@ -1291,7 +1292,7 @@
   Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove
     sequential read support.
   Added some "#if PNG_WRITE_SUPPORTED" blocks.
-  #ifdef'ed out some redundancy in png_malloc_default().
+  Removed some redundancy with #ifdef/#endif in png_malloc_default().
   Use png_malloc instead of png_zalloc to allocate the pallete.
 version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
   Fixed buffer overflow vulnerability in png_handle_tRNS()
@@ -1359,7 +1360,8 @@
   Fixed bug in png_text_compress() that would fail to complete a large block.
   Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
     strip alpha operation in png_do_strip_filler().
-  #ifdef out png_info_init in png.c and png_read_init in pngread.c (as of 1.3.0)
+  Comment out with #ifdef/#endif png_info_init in png.c and png_read_init
+    in pngread.c (as of 1.3.0)
 version 1.2.8beta2 [November 2, 2004]
   Reduce color_type to a nonalpha type after strip alpha operation in
     png_do_strip_filler().
@@ -1745,9 +1747,9 @@
   Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
 
 version 1.2.19beta7 [May 22, 2007]
-  Squelched png_squelch_warnings() in pnggccrd.c and added an
-    #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
-    the warnings that png_squelch_warnings was squelching.
+  Squelched png_squelch_warnings() in pnggccrd.c and added
+    an #ifdef PNG_MMX_CODE_SUPPORTED/#endif block around the declarations
+    that caused the warnings that png_squelch_warnings was squelching.
 
 version 1.2.19beta8 [May 22, 2007]
   Removed __MMX__ from test in pngconf.h.
@@ -2145,7 +2147,7 @@
     automake options.
   Changed $(ECHO) to echo in Makefile.am and Makefile.in
   Updated all configure files to autoconf-2.62
-  #ifdef out pnggcrd.c code if using MSC_VER
+  Comment out pnggcrd.c code with #ifdef/#endif if using MSC_VER
 
 version 1.2.29rc01 [May 4, 2008]
   No changes.
@@ -2312,9 +2314,6 @@
 version 1.2.35rc02 [February 12, 2009]
   Fix typo in new png_memset call in pngset.c (png_color should be png_charp)
 
-version 1.2.35 [February 14, 2009]
-  No changes.
-
 version 1.0.43 and 1.2.35 [February 14, 2009]
   No changes.
 
@@ -2422,6 +2421,33 @@
 version 1.0.47 and 1.2.38 [July 16, 2009]
   No changes.
 
+version 1.2.39beta01 [July 25, 2009]
+  Added a prototype for png_64bit_product() in png.c
+
+version 1.2.39beta02 [July 27, 2009]
+  Avoid a possible NULL dereference in debug build, in png_set_text_2().
+    (bug introduced in libpng-0.95, discovered by Evan Rouault)
+
+version 1.2.39beta03 [July 29, 2009]
+  Relocated new png_64_bit_product() prototype into png.h
+  Expanded the information about prototypes in the libpng style section of
+    the documentation.
+  Rebuilt configure scripts with autoconf-2.64.
+
+version 1.2.39beta04 [August 1, 2009]
+  Replaced *.tar.lzma with *.txz in distribution.  Get the xz codec
+    from <http://tukaani.org/xz>.
+
+version 1.2.39beta05 [August 1, 2009]
+  Reject attempt to write iCCP chunk with negative embedded profile length
+    (JD Chen)
+
+version 1.2.39c01 [August 6, 2009]
+  No changes.
+
+version 1.2.39 and 1.0.48 [August 13, 2009]
+  No changes.
+
 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 220a199..b4ac8b2 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.47 - July 16, 2009
+Installing libpng version 1.0.48 - August 13, 2009
 
 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-1.0.47" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.0.48" 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 libpng10.so.0.1.0.47)
+                       gcc, creates libpng10.so.0.1.0.48)
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng10.so.0.1.0.47)
+                       (gcc, creates libpng10.so.0.1.0.48)
  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 libpng10.so.0.1.0.47)
+                       creates libpng10.so.0.1.0.48)
  makefile.sunos    =>  Sun makefile
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng10.so.0.1.0.47)
+                       creates libpng10.so.0.1.0.48)
  makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
-                       creates libpng10.so.0.1.0.47)
+                       creates libpng10.so.0.1.0.48)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng10.so.0.1.0.47)
+                       creates libpng10.so.0.1.0.48)
  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 11051e2..bb8245f 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.0.47
+Known bugs in libpng version 1.0.48
 
 1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
diff --git a/LICENSE b/LICENSE
index bbcb18e..0e6cc18 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 1.0.47, July 16, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.48, August 13, 2009, are
 Copyright (c) 2004, 2006-2009 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
-July 16, 2009
+August 13, 2009
diff --git a/Makefile.am b/Makefile.am
index d13150c..dfb8cb7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,9 +2,9 @@
 #   Source file for Makefile.in (and hence Makefile)
 #
 # Makefile.am need only be changed on a major version number
-# change (e.g. libpng12 --> libpng13).  In that case seach
+# change (e.g. libpng12 --> libpng14).  In that case seach
 # this file for every instance of the old base name (libpng12)
-# and change to the new one (libpng13), then change the
+# and change to the new one (libpng14), then change the
 # -version-number settings below so that the new values have
 # the correct major part (first field).
 
@@ -86,7 +86,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.47.txt pngvcrd.c 
+	example.c libpng-1.0.48.txt pngvcrd.c 
 
 CLEANFILES= pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/Makefile.in b/Makefile.in
index 6dc0e4b..781070d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -19,9 +19,9 @@
 #   Source file for Makefile.in (and hence Makefile)
 #
 # Makefile.am need only be changed on a major version number
-# change (e.g. libpng12 --> libpng13).  In that case seach
-# this file for every instance of the old base name (libpng10)
-# and change to the new one (libpng13), then change the
+# change (e.g. libpng12 --> libpng14).  In that case seach
+# this file for every instance of the old base name (libpng12)
+# and change to the new one (libpng14), then change the
 # -version-number settings below so that the new values have
 # the correct major part (first field).
 
@@ -106,14 +106,14 @@
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(libpng_la_LDFLAGS) $(LDFLAGS) -o $@
 libpng10_la_LIBADD =
-am_libpng10_la_OBJECTS = libpng10_la-png.lo libpng10_la-pngset.lo \
-	libpng10_la-pngget.lo libpng10_la-pngrutil.lo \
-	libpng10_la-pngtrans.lo libpng10_la-pngwutil.lo \
-	libpng10_la-pngread.lo libpng10_la-pngrio.lo \
-	libpng10_la-pngwio.lo libpng10_la-pngwrite.lo \
-	libpng10_la-pngrtran.lo libpng10_la-pngwtran.lo \
-	libpng10_la-pngmem.lo libpng10_la-pngerror.lo \
-	libpng10_la-pngpread.lo
+am_libpng10_la_OBJECTS = libpng10_la-png.lo \
+	libpng10_la-pngset.lo libpng10_la-pngget.lo \
+	libpng10_la-pngrutil.lo libpng10_la-pngtrans.lo \
+	libpng10_la-pngwutil.lo libpng10_la-pngread.lo \
+	libpng10_la-pngrio.lo libpng10_la-pngwio.lo \
+	libpng10_la-pngwrite.lo libpng10_la-pngrtran.lo \
+	libpng10_la-pngwtran.lo libpng10_la-pngmem.lo \
+	libpng10_la-pngerror.lo libpng10_la-pngpread.lo
 libpng10_la_OBJECTS = $(am_libpng10_la_OBJECTS)
 libpng10_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
@@ -218,6 +218,7 @@
 PACKAGE_NAME = @PACKAGE_NAME@
 PACKAGE_STRING = @PACKAGE_STRING@
 PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
 PNGLIB_MAJOR = @PNGLIB_MAJOR@
@@ -319,8 +320,9 @@
 libpng10_la_CPPFLAGS = @LIBPNG_DEFINES@
 
 # MAJOR UPGRADE: the version-number settings below must be changed.
-libpng10_la_LDFLAGS = -no-undefined -export-dynamic -version-number \
-	0:@PNGLIB_RELEASE@:0 $(am__append_1) $(am__append_2)
+libpng10_la_LDFLAGS = -no-undefined -export-dynamic \
+	-version-number 0:@PNGLIB_RELEASE@:0 $(am__append_1) \
+	$(am__append_2)
 # -rpath is needed as automake doesn't know the directory
 libpng_la_LDFLAGS = -rpath '$(libdir)' -no-undefined -export-dynamic \
 	-version-number 2:@PNGLIB_RELEASE@:0
@@ -350,7 +352,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.47.txt pngvcrd.c 
+	example.c libpng-1.0.48.txt pngvcrd.c 
 
 CLEANFILES = pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/README b/README
index ec47f86..5f71a1a 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.0.47 - July 16, 2009 (shared library 10.0)
+README for libpng version 1.0.48 - August 13, 2009 (shared library 10.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -194,11 +194,11 @@
        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 libpng10.so.0.1.0.47)
+                            gcc, creates libpng10.so.0.1.0.48)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng10.so.0.1.0.47)
+                            (gcc, creates libpng10.so.0.1.0.48)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng10.so.0.1.0.47,
+                            (gcc, creates libpng10.so.0.1.0.48,
                             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
@@ -220,12 +220,12 @@
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng10.so.0.1.0.47)
+                            (gcc, creates libpng10.so.0.1.0.48)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng10.so.0.1.0.47)
+                            (gcc, creates libpng10.so.0.1.0.48)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng10.so.0.1.0.47)
+                            (gcc, creates libpng10.so.0.1.0.48)
        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 ec19211..c2d4d98 100644
--- a/Y2KINFO
+++ b/Y2KINFO
@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      July 16, 2009
+      August 13, 2009
 
       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 1.0.47 are Y2K compliant.  It is my belief that earlier
+      upward through 1.0.48 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/aclocal.m4 b/aclocal.m4
index 4dca2cf..0dabd6b 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -13,8 +13,8 @@
 
 m4_ifndef([AC_AUTOCONF_VERSION],
   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
-m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.63],,
-[m4_warning([this file was generated for autoconf 2.63.
+m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.64],,
+[m4_warning([this file was generated for autoconf 2.64.
 You have another version of autoconf.  It may work, but is not guaranteed to.
 If you have problems, you may need to regenerate the build system entirely.
 To do so, use the procedure documented by the package, typically `autoreconf'.])])
diff --git a/config.h.in b/config.h.in
index 711d3b5..fb23495 100644
--- a/config.h.in
+++ b/config.h.in
@@ -64,6 +64,9 @@
 /* Define to the one symbol short name of this package. */
 #undef PACKAGE_TARNAME
 
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
 /* Define to the version of this package. */
 #undef PACKAGE_VERSION
 
diff --git a/configure b/configure
index 8dc1176..1781a4b 100755
--- a/configure
+++ b/configure
Binary files differ
diff --git a/configure.ac b/configure.ac
index e2cd6d3..639cf74 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,15 +18,15 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.0.47], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.0.48], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.0.47
+PNGLIB_VERSION=1.0.48
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
-PNGLIB_RELEASE=47
+PNGLIB_RELEASE=48
 
 dnl End of version number stuff
 
diff --git a/libpng-1.0.47.txt b/libpng-1.0.48.txt
similarity index 99%
rename from libpng-1.0.47.txt
rename to libpng-1.0.48.txt
index a1e6e9c..b4d74a7 100644
--- a/libpng-1.0.47.txt
+++ b/libpng-1.0.48.txt
@@ -1,15 +1,17 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.47 - July 16, 2009
+ libpng version 1.0.48 - August 13, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
- For conditions of distribution and use, see copyright
- notice in png.h.
+
+ This document is released under the libpng license.
+ For conditions of distribution and use, see the disclaimer
+ and license in png.h
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.47 - July 16, 2009
+ libpng versions 0.97, January 1998, through 1.0.48 - August 13, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -2840,7 +2842,9 @@
 The png_get_io_ptr() function has been present since libpng-0.88, has never
 changed, and is unaffected by conditional compilation macros.  It is the
 best choice for use in configure scripts for detecting the presence of any
-libpng version since 0.88.
+libpng version since 0.88.  In an autoconf "configure.in" you could use
+
+    AC_CHECK_LIB(png, png_get_io_ptr, ...
 
 XI. Source code repository
 
@@ -2917,7 +2921,10 @@
     body;
  }
 
-The prototypes for all exported functions appear in png.h.
+The prototypes for all exported functions appear in png.h,
+above the comment that says
+
+    /* Maintainer: Put new public prototypes here ... */
 
 We mark all non-exported functions with "/* PRIVATE */"":
 
@@ -2927,9 +2934,12 @@
     body;
  }
 
-The prototypes for non-exported functions can appear in
+The prototypes for non-exported functions (except for those in
+pngtest) appear in
 the PNG_INTERNAL section of png.h
-or in the file where the function is located.
+above the comment that says
+
+  /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
 
 The names of all exported functions and variables begin
 with  "png_", and all publicly visible C preprocessor
@@ -2953,13 +2963,13 @@
 
 XIII. Y2K Compliance in libpng
 
-July 16, 2009
+August 13, 2009
 
 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 1.0.47 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.48 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 cc4b70d..2ac11de 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "July 16, 2009"
+.TH LIBPNG 3 "August 13, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.47
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.48
 .SH SYNOPSIS
 \fI\fB
 
@@ -821,16 +821,18 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.47 - July 16, 2009
+ libpng version 1.0.48 - August 13, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
- For conditions of distribution and use, see copyright
- notice in png.h.
+
+ This document is released under the libpng license.
+ For conditions of distribution and use, see the disclaimer
+ and license in png.h
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.47 - July 16, 2009
+ libpng versions 0.97, January 1998, through 1.0.48 - August 13, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -3661,7 +3663,9 @@
 The png_get_io_ptr() function has been present since libpng-0.88, has never
 changed, and is unaffected by conditional compilation macros.  It is the
 best choice for use in configure scripts for detecting the presence of any
-libpng version since 0.88.
+libpng version since 0.88.  In an autoconf "configure.in" you could use
+
+    AC_CHECK_LIB(png, png_get_io_ptr, ...
 
 .SH XI. Source code repository
 
@@ -3738,7 +3742,10 @@
     body;
  }
 
-The prototypes for all exported functions appear in png.h.
+The prototypes for all exported functions appear in png.h,
+above the comment that says
+
+    /* Maintainer: Put new public prototypes here ... */
 
 We mark all non-exported functions with "/* PRIVATE */"":
 
@@ -3748,9 +3755,12 @@
     body;
  }
 
-The prototypes for non-exported functions can appear in
+The prototypes for non-exported functions (except for those in
+pngtest) appear in
 the PNG_INTERNAL section of png.h
-or in the file where the function is located.
+above the comment that says
+
+  /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
 
 The names of all exported functions and variables begin
 with  "png_", and all publicly visible C preprocessor
@@ -3774,13 +3784,13 @@
 
 .SH XIII. Y2K Compliance in libpng
 
-July 16, 2009
+August 13, 2009
 
 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 1.0.47 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.48 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
@@ -4055,6 +4065,10 @@
  1.2.38rc01-03       13    10238  12.so.0.38[.0]
  1.0.47              10    10047  10.so.0.47[.0]
  1.2.38              13    10238  12.so.0.38[.0]
+ 1.2.39beta01-05     13    10239  12.so.0.39[.0]
+ 1.2.39rc01          13    10239  12.so.0.39[.0]
+ 1.0.48              10    10048  10.so.0.48[.0]
+ 1.2.39              13    10239  12.so.0.39[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -4110,7 +4124,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.0.47 - July 16, 2009:
+Libpng version 1.0.48 - August 13, 2009:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4133,7 +4147,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.0.47, July 16, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.48, August 13, 2009, 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
@@ -4232,7 +4246,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-July 16, 2009
+August 13, 2009
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 72de841..9d9af2f 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "July 16, 2009"
+.TH LIBPNGPF 3 "August 13, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.47
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.48
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/png.5 b/png.5
index 3261291..1e7d7df 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "July 16, 2009"
+.TH PNG 5 "August 13, 2009"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 7e580c2..b59344c 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Last changed in libpng 1.2.39 [August 13, 2009]
  * Copyright (c) 1998-2009 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.)
@@ -16,7 +16,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_47 Your_png_h_is_not_version_1_0_47;
+typedef version_1_0_48 Your_png_h_is_not_version_1_0_48;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
@@ -148,7 +148,7 @@
 #ifdef PNG_1_0_X
 voidpf PNGAPI
 #else
-voidpf /* private */
+voidpf /* PRIVATE */
 #endif
 png_zalloc(voidpf png_ptr, uInt items, uInt size)
 {
@@ -192,7 +192,7 @@
 #ifdef PNG_1_0_X
 void PNGAPI
 #else
-void /* private */
+void /* PRIVATE */
 #endif
 png_zfree(voidpf png_ptr, voidpf ptr)
 {
@@ -705,7 +705,7 @@
 png_get_copyright(png_structp png_ptr)
 {
    png_ptr = png_ptr;  /* Silence compiler warning about unused png_ptr */
-   return ((png_charp) "\n libpng version 1.0.47 - July 16, 2009\n\
+   return ((png_charp) "\n libpng version 1.0.48 - August 13, 2009\n\
    Copyright (c) 1998-2009 Glenn Randers-Pehrson\n\
    Copyright (c) 1996-1997 Andreas Dilger\n\
    Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
@@ -828,7 +828,8 @@
  *    A and D, and X || Y is (X << 16) + Y.
 */
 
-void png_64bit_product (long v1, long v2, unsigned long *hi_product,
+void /* PRIVATE */
+png_64bit_product (long v1, long v2, unsigned long *hi_product,
    unsigned long *lo_product)
 {
    int a, b, c, d;
@@ -852,7 +853,7 @@
    *lo_product = (unsigned long)lo;
 }
 
-int /* private */
+int /* PRIVATE */
 png_check_cHRM_fixed(png_structp png_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,
diff --git a/png.h b/png.h
index f9c65e1..152f047 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.47 - July 16, 2009
+ * libpng version 1.0.48 - August 13, 2009
  * Copyright (c) 1998-2009 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.)
@@ -10,7 +10,7 @@
  * 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 1.0.47 - July 16, 2009: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.48 - August 13, 2009: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -237,6 +237,10 @@
  *    1.2.38rc01-03           13    10238  12.so.0.38[.0]
  *    1.0.47                  10    10047  10.so.0.47[.0]
  *    1.2.38                  13    10238  12.so.0.38[.0]
+ *    1.2.39beta01-05         13    10239  12.so.0.39[.0]
+ *    1.2.39rc01              13    10239  12.so.0.39[.0]
+ *    1.0.48                  10    10048  10.so.0.48[.0]
+ *    1.2.39                  13    10239  12.so.0.39[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -268,7 +272,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.0.47, July 16, 2009, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.0.48, August 13, 2009, are
  * Copyright (c) 2004, 2006-2009 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:
@@ -380,13 +384,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    July 16, 2009
+ *    August 13, 2009
  *
  *    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 1.0.47 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.48 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
@@ -442,9 +446,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.47"
+#define PNG_LIBPNG_VER_STRING "1.0.48"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.47 - July 16, 2009\n"
+   " libpng version 1.0.48 - August 13, 2009\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  10
@@ -452,7 +456,7 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   0
-#define PNG_LIBPNG_VER_RELEASE 47
+#define PNG_LIBPNG_VER_RELEASE 48
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
@@ -482,7 +486,7 @@
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release
  */
-#define PNG_LIBPNG_VER 10047 /* 1.0.47 */
+#define PNG_LIBPNG_VER 10048 /* 1.0.48 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* include the compression library's header */
@@ -1509,7 +1513,7 @@
 /* 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_0_47;
+typedef png_structp version_1_0_48;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -3697,6 +3701,14 @@
    png_fixed_point int_blue_y));
 #endif
 
+#if defined(PNG_cHRM_SUPPORTED)
+#if !defined(PNG_NO_CHECK_cHRM)
+/* Added at libpng version 1.2.34 */
+PNG_EXTERN void png_64bit_product (long v1, long v2, unsigned long *hi_product,
+   unsigned long *lo_product);
+#endif
+#endif
+
 /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
 
 #endif /* PNG_INTERNAL */
diff --git a/pngconf.h b/pngconf.h
index e80c477..b849dee 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.0.47 - July 16, 2009
+ * libpng version 1.0.48 - August 13, 2009
  * Copyright (c) 1998-2009 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/pngpread.c b/pngpread.c
index 9eddd6e..7adb7b8 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.2.37 [July 16, 2009]
+ * Last changed in libpng 1.2.38 [July 16, 2009]
  * Copyright (c) 1998-2009 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/pngset.c b/pngset.c
index 48e8bbb..3c110eb 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.2.38 [July 16, 2009]
+ * Last changed in libpng 1.2.39 [August 13, 2009]
  * Copyright (c) 1998-2009 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.)
@@ -708,7 +708,8 @@
 {
    int i;
 
-   png_debug1(1, "in %s storage function", (png_ptr->chunk_name[0] == '\0' ?
+   png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
+      png_ptr->chunk_name[0] == '\0') ?
       "text" : (png_const_charp)png_ptr->chunk_name));
 
    if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
diff --git a/pngtest.c b/pngtest.c
index 4044bbf..b8015de 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1689,4 +1689,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_47 your_png_h_is_not_version_1_0_47;
+typedef version_1_0_48 your_png_h_is_not_version_1_0_48;
diff --git a/pngwutil.c b/pngwutil.c
index cd0d3d3..aed280e 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Last changed in libpng 1.2.39 [August 13, 2009]
  * Copyright (c) 1998-2009 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.)
@@ -788,6 +788,14 @@
           ((*( (png_bytep)profile + 2))<< 8) |
           ((*( (png_bytep)profile + 3))    );
 
+   if (embedded_profile_len < 0)
+   {
+      png_warning(png_ptr,
+        "Embedded profile length in iCCP chunk is negative");
+      png_free(png_ptr, new_name);
+      return;
+   }
+
    if (profile_len < embedded_profile_len)
    {
       png_warning(png_ptr,
@@ -2119,9 +2127,12 @@
    png_uint_32 mins, bpp;
    png_byte filter_to_do = png_ptr->do_filter;
    png_uint_32 row_bytes = row_info->rowbytes;
-#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
    int num_p_filters = (int)png_ptr->num_prev_filters;
-#endif
+#endif 
+
+   png_debug(1, "in png_write_find_filter");
+
 
    png_debug(1, "in png_write_find_filter");
    /* Find out how many bytes offset each pixel is */
diff --git a/scripts/CMakeLists.txt b/scripts/CMakeLists.txt
index 9c5c91f..d24a315 100644
--- a/scripts/CMakeLists.txt
+++ b/scripts/CMakeLists.txt
@@ -9,7 +9,7 @@
 
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 0)
-set(PNGLIB_RELEASE 47)
+set(PNGLIB_RELEASE 48)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
 
@@ -172,7 +172,7 @@
 
 # SET UP LINKS
 set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#    VERSION 0.${PNGLIB_RELEASE}.1.0.47
+#    VERSION 0.${PNGLIB_RELEASE}.1.0.48
      VERSION 0.${PNGLIB_RELEASE}.0
      SOVERSION 0
      CLEAN_DIRECT_OUTPUT 1)
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index ffae720..092a391 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.0.47
+version=1.0.48
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 615749c..f1a2cb3 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.0.47
+Version: 1.0.48
 Libs: -L${libdir} -lpng10
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index d413d34..61b01be 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index 0b3c37b..bffef9d 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index 2431e59..d76b615 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -23,7 +23,7 @@
 
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index 0628484..846887d 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index f3c01c0..5fe0049 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -77,7 +77,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 CYGDLL = 10
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index c69d0ba..4a7c798 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -22,7 +22,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 10
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index a8be4d6..c7bd350 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index 12ca816..0d9275d 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -16,7 +16,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index 10f8d27..bb44276 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -17,7 +17,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index b57424b..f4b73f7 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -21,7 +21,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index eedca35..3d61816 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index 6c4173f..2bfdbdb 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -21,7 +21,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index 49a9fae..377a9ef 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index 6f4fa57..1c06360 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -77,7 +77,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 MINGDLL = 10
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 274e349..2ce20f2 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png10
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.47
+SHLIB_MINOR=	1.0.48
 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 0720722..c7ee1d5 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.0.47
+SHLIB_MINOR=	1.0.48
 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 329890e..f507595 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 68e04a0..3f07d4f 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.47
+SHLIB_MINOR=	1.0.48
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index e5d6127..cbc853b 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index 76ee175..c3b8eec 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index 6c38e79..039a4fb 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index 3890b59..25bacfc 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -11,7 +11,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index b50ccb7..eac0d14 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.solaris-x86 b/scripts/makefile.solaris-x86
index b189d1d..d6eba1c 100644
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.47
+PNGMIN = 1.0.48
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index 23603e7..9c29054 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.0.47
+; Version 1.0.48
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngw32.def b/scripts/pngw32.def
index 8ccaae3..e656163 100644
--- a/scripts/pngw32.def
+++ b/scripts/pngw32.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.0.47
+;Version 1.0.48
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3