diff --git a/ANNOUNCE b/ANNOUNCE
index 40b7a9d..791b183 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.0beta56 - December 7, 2010
+Libpng 1.5.0beta57 - December 7, 2010
 
 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
 
-   1.5.0beta56.tar.xz (LZMA-compressed, recommended)
-   1.5.0beta56.tar.gz
-   1.5.0beta56.tar.bz2
+   1.5.0beta57.tar.xz (LZMA-compressed, recommended)
+   1.5.0beta57.tar.gz
+   1.5.0beta57.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp150b56.zip
-   lp150b56.7z
+   lp150b57.zip
+   lp150b57.7z
 
 Other information:
 
-   1.5.0beta56-README.txt
-   1.5.0beta56-LICENSE.txt
+   1.5.0beta57-README.txt
+   1.5.0beta57-LICENSE.txt
 
 Changes since the last public release (1.4.1):
 
@@ -459,6 +459,8 @@
   Fixed some incorrect "=" macro names in pnglibconf.dfa
   Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
 
+Version 1.5.0beta57 [December 7, 2010]
+
 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/CHANGES b/CHANGES
index 56dbd7a..7e76db4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3097,6 +3097,8 @@
   Fixed some incorrect "=" macro names in pnglibconf.dfa
   Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
 
+Version 1.5.0beta57 [December 7, 2010]
+
 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/CMakeLists.txt b/CMakeLists.txt
index 6947bf0..227e307 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -261,7 +261,7 @@
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 15.${PNGLIB_RELEASE}.1.5.0beta56
+#   VERSION 15.${PNGLIB_RELEASE}.1.5.0beta57
     VERSION 15.${PNGLIB_RELEASE}.0
     SOVERSION 15
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/LICENSE b/LICENSE
index 820a70c..0ce9e11 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 1.5.0beta56, December 7, 2010, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.0beta57, December 7, 2010, 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
diff --git a/README b/README
index 5fda3d2..a4eab42 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.0beta56 - December 7, 2010 (shared library 15.0)
+README for libpng version 1.5.0beta57 - December 7, 2010 (shared library 15.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/configure b/configure
index f18bd17..562300b 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 1.5.0beta56.
+# Generated by GNU Autoconf 2.65 for libpng 1.5.0beta57.
 #
 # 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='1.5.0beta56'
-PACKAGE_STRING='libpng 1.5.0beta56'
+PACKAGE_VERSION='1.5.0beta57'
+PACKAGE_STRING='libpng 1.5.0beta57'
 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 1.5.0beta56 to adapt to many kinds of systems.
+\`configure' configures libpng 1.5.0beta57 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 1.5.0beta56:";;
+     short | recursive ) echo "Configuration of libpng 1.5.0beta57:";;
    esac
   cat <<\_ACEOF
 
@@ -1467,7 +1467,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.5.0beta56
+libpng configure 1.5.0beta57
 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 1.5.0beta56, which was
+It was created by libpng $as_me 1.5.0beta57, 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='1.5.0beta56'
+ VERSION='1.5.0beta57'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2764,7 +2764,7 @@
 
 
 
-PNGLIB_VERSION=1.5.0beta56
+PNGLIB_VERSION=1.5.0beta57
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
 PNGLIB_RELEASE=0
@@ -12262,7 +12262,7 @@
 # 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 1.5.0beta56, which was
+This file was extended by libpng $as_me 1.5.0beta57, which was
 generated by GNU Autoconf 2.65.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -12328,7 +12328,7 @@
 cat >>$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 1.5.0beta56
+libpng config.status 1.5.0beta57
 configured by $0, generated by GNU Autoconf 2.65,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index fbb1fa8..c9d1119 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,12 +18,12 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.5.0beta56], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.5.0beta57], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.5.0beta56
+PNGLIB_VERSION=1.5.0beta57
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
 PNGLIB_RELEASE=0
diff --git a/libpng-manual.txt b/libpng-manual.txt
index ae1b63c..5df9c24 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.0beta56 - December 7, 2010
+ libpng version 1.5.0beta57 - December 7, 2010
  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 1.5.0beta56 - December 7, 2010
+ libpng versions 0.97, January 1998, through 1.5.0beta57 - December 7, 2010
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
@@ -1050,7 +1050,7 @@
 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 1.5.0beta56, not all possible expansions are supported.
+As of libpng version 1.5.0beta57, 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
@@ -3746,7 +3746,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.5.0beta56 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.0beta57 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 ccd46ce..1abd904 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
 .TH LIBPNG 3 "December 7, 2010"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta56
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta57
 .SH SYNOPSIS
 \fI\fB
 
@@ -851,7 +851,7 @@
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.0beta56 - December 7, 2010
+ libpng version 1.5.0beta57 - December 7, 2010
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
@@ -862,7 +862,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.0beta56 - December 7, 2010
+ libpng versions 0.97, January 1998, through 1.5.0beta57 - December 7, 2010
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
@@ -1901,7 +1901,7 @@
 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 1.5.0beta56, not all possible expansions are supported.
+As of libpng version 1.5.0beta57, 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
@@ -4597,7 +4597,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.5.0beta56 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.0beta57 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
@@ -4777,7 +4777,7 @@
  1.4.2               14    10402  14.so.14.2[.0]
  1.4.3               14    10403  14.so.14.3[.0]
  1.4.4               14    10404  14.so.14.4[.0]
- 1.5.0beta01-56      15    10500  15.so.15.0[.0]
+ 1.5.0beta01-57      15    10500  15.so.15.0[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -4834,7 +4834,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.0beta56 - December 7, 2010:
+Libpng version 1.5.0beta57 - December 7, 2010:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4857,7 +4857,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.0beta56, December 7, 2010, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.0beta57, December 7, 2010, 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 19e32fc..99e30fe 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
 .TH LIBPNGPF 3 "December 7, 2010"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta56
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta57
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"
diff --git a/png.c b/png.c
index 9d927e6..e86cc72 100644
--- a/png.c
+++ b/png.c
@@ -14,7 +14,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_0beta56 Your_png_h_is_not_version_1_5_0beta56;
+typedef png_libpng_version_1_5_0beta57 Your_png_h_is_not_version_1_5_0beta57;
 
 /* 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
@@ -556,13 +556,13 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.5.0beta56 - December 7, 2010" PNG_STRING_NEWLINE \
+     "libpng version 1.5.0beta57 - December 7, 2010" 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 "libpng version 1.5.0beta56 - December 7, 2010\
+      return "libpng version 1.5.0beta57 - December 7, 2010\
       Copyright (c) 1998-2010 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
diff --git a/png.h b/png.h
index 17551c8..1a1d866 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.0beta56 - December 7, 2010
+ * libpng version 1.5.0beta57 - December 7, 2010
  * Copyright (c) 1998-2010 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 1.5.0beta56 - December 7, 2010: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.0beta57 - December 7, 2010: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -141,7 +141,7 @@
  *    1.4.2                   14    10402  14.so.14.2[.0]
  *    1.4.3                   14    10403  14.so.14.3[.0]
  *    1.4.4                   14    10404  14.so.14.4[.0]
- *    1.5.0beta01-56          15    10500  15.so.15.0[.0]
+ *    1.5.0beta01-57          15    10500  15.so.15.0[.0]
  *
  *   Henceforth the source version will match the shared-library major
  *   and minor numbers; the shared-library major version number will be
@@ -173,7 +173,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.0beta56, December 7, 2010, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.0beta57, December 7, 2010, 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:
@@ -291,7 +291,7 @@
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.5.0beta56 are Y2K compliant.  It is my belief that
+ *    upward through 1.5.0beta57 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
@@ -347,9 +347,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.0beta56"
+#define PNG_LIBPNG_VER_STRING "1.5.0beta57"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.0beta56 - December 7, 2010\n"
+     " libpng version 1.5.0beta57 - December 7, 2010\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
@@ -362,7 +362,7 @@
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  56
+#define PNG_LIBPNG_VER_BUILD  57
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -504,7 +504,7 @@
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char* png_libpng_version_1_5_0beta56;
+typedef char* png_libpng_version_1_5_0beta57;
 
 /* Three color definitions.  The order of the red, green, and blue, (and the
  * exact size) is not important, although the size of the fields need to
diff --git a/pngconf.h b/pngconf.h
index bbc4aa6..99a00e0 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.0beta56 - (PENDING RELEASE)
+ * libpng version 1.5.0beta57 - (PENDING RELEASE)
  *
  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngpriv.h b/pngpriv.h
index 2fa26f4..1054af9 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
 
 /* pngpriv.h - private declarations for use inside libpng
  *
- * libpng version 1.5.0beta56 - (PENDING RELEASE)
+ * libpng version 1.5.0beta57 - (PENDING RELEASE)
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngtest.c b/pngtest.c
index 42c9352..2435750 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1784,4 +1784,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_0beta56 Your_png_h_is_not_version_1_5_0beta56;
+typedef png_libpng_version_1_5_0beta57 Your_png_h_is_not_version_1_5_0beta57;
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 533e6c3..f908132 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.0beta56 - December 7, 2010
+libpng version 1.5.0beta57 - December 7, 2010
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index ddbb92d..824c0d7 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.0beta56 - December 7, 2010
+ * libpng version 1.5.0beta57 - December 7, 2010
  *
  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 5d9d514..b52b9c4 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,9 +1,9 @@
 
-Makefiles for  libpng version 1.5.0beta56 - December 7, 2010
+Makefiles for  libpng version 1.5.0beta57 - December 7, 2010
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng15.so.15.1.5.0beta56)
+                       (gcc, creates libpng15.so.15.1.5.0beta57)
  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 libpng15.so.15.1.5.0beta56)
+                       (gcc, creates libpng15.so.15.1.5.0beta57)
  makefile.freebsd  =>  FreeBSD makefile
  makefile.gcc      =>  Generic gcc makefile
  makefile.hpgcc    =>  HPUX makefile using gcc
@@ -35,12 +35,12 @@
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng15.so.15.1.5.0beta56)
+                       creates libpng15.so.15.1.5.0beta57)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng15.so.15.1.5.0beta56)
+                       creates libpng15.so.15.1.5.0beta57)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng15.so.15.1.5.0beta56)
+                       creates libpng15.so.15.1.5.0beta57)
  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 e006204..cd92478 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.5.0beta56
+version=1.5.0beta57
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 88a5aad..01053b2 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.5.0beta56
+Version: 1.5.0beta57
 Libs: -L${libdir} -lpng15
 Cflags: -I${includedir}
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 897fb9f..365d43f 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png15
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.5.0beta56
+SHLIB_MINOR=	1.5.0beta57
 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 7568add..2e7c547 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.5.0beta56
+SHLIB_MINOR=	1.5.0beta57
 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 0b00c4c..fdcc0db 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.5.0beta56
+SHLIB_MINOR=	1.5.0beta57
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/pngwin.def b/scripts/pngwin.def
index 3ac5e9a..7e006a0 100644
--- a/scripts/pngwin.def
+++ b/scripts/pngwin.def
@@ -11,7 +11,7 @@
 ;OS2 CODE PRELOAD MOVEABLE DISCARDABLE
 
 EXPORTS
-;Version 1.5.0beta56
+;Version 1.5.0beta57
  png_access_version_number @1
  png_set_sig_bytes @2
  png_sig_cmp @3
diff --git a/scripts/pngwin.dfn b/scripts/pngwin.dfn
index 4c38024..5e3d744 100644
--- a/scripts/pngwin.dfn
+++ b/scripts/pngwin.dfn
@@ -29,7 +29,7 @@
 PNG_DEFN_MAGIC-;OS2 CODE		PRELOAD MOVEABLE DISCARDABLE-PNG_DEFN_END
 PNG_DEFN_MAGIC--PNG_DEFN_END
 PNG_DEFN_MAGIC-EXPORTS-PNG_DEFN_END
-PNG_DEFN_MAGIC-;Version 1.5.0beta56-PNG_DEFN_END
+PNG_DEFN_MAGIC-;Version 1.5.0beta57-PNG_DEFN_END
 
 /* Read the defaults, but use scripts/pnglibconf.h.prebuilt; the 'standard'
  * header file.
diff --git a/scripts/symbols.def b/scripts/symbols.def
index 25b460d..5f67932 100644
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.5.0beta56
+;Version 1.5.0beta57
  png_access_version_number @1
  png_set_sig_bytes @2
  png_sig_cmp @3