diff --git a/ANNOUNCE b/ANNOUNCE
index b72b72b..fc8296f 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.0.56 - July 9, 2011
+Libpng 1.0.57 - February 18, 2012
 
 This is a public release of libpng, intended for use in production codes.
 
@@ -8,53 +8,42 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.0.56.tar.xz (LZMA-compressed, recommended)
-   libpng-1.0.56.tar.gz
-   libpng-1.0.56.tar.bz2
+   libpng-1.0.57.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.57.tar.gz
+   libpng-1.0.57.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.0.56-no-config.tar.xz (LZMA-compressed, recommended)
-   libpng-1.0.56-no-config.tar.gz
-   libpng-1.0.56-no-config.tar.bz2
+   libpng-1.0.57-no-config.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.57-no-config.tar.gz
+   libpng-1.0.57-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1056.zip
-   lpng1056.7z
-   lpng1056.tar.bz2
+   lpng1057.zip
+   lpng1057.7z
+   lpng1057.tar.bz2
 
 Project files
 
-   libpng-1.0.56-project-netware.zip
-   libpng-1.0.56-project-wince.zip
+   libpng-1.0.57-project-netware.zip
+   libpng-1.0.57-project-wince.zip
 
 Other information:
 
-   libpng-1.0.56-README.txt
-   libpng-1.0.56-KNOWNBUGS.txt
-   libpng-1.0.56-LICENSE.txt
-   libpng-1.0.56-Y2K-compliance.txt
+   libpng-1.0.57-README.txt
+   libpng-1.0.57-KNOWNBUGS.txt
+   libpng-1.0.57-LICENSE.txt
+   libpng-1.0.57-Y2K-compliance.txt
 
-Changes since the last public release (1.0.53):
+Changes since the last public release (1.0.56):
 
-version 1.0.55 [July 9, 2011]
+version 1.0.57 [February 18, 2012]
 
-  Fixed uninitialized memory read in png_format_buffer() (Bug
-    report by Frank Busse, related to CVE-2004-0421).
-  Pass "" instead of '\0' to png_default_error() in png_err().  This mistake
-    was introduced in libpng-1.2.20beta01.
-  Check for up->location !PNG_AFTER_IDAT when writing unknown chunks
-    before IDAT.
-  Ported bugfix in pngrtran.c from 1.5.3: when expanding a paletted image,
-    always expand to RGBA if transparency is present.
-  Check for integer overflow in png_set_rgb_to_gray().
-  Check for sCAL chunk too short.
-  Added CMakeLists.txt, projects/xcode, and pnggccrd.c to EXTRA_DIST in
-    Makefile.am and Makefile.in
-  Udated copyright year to 2011.
+  Updated contrib/pngminus/makefile.std (Samuli Souminen)
+  Fixed CVE-2011-3026 buffer overrun bug.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index b356fca..8fcbe61 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,4 @@
-/*
+#if 0
 CHANGES - changes for libpng
 
 version 0.2
@@ -2725,6 +2725,15 @@
 version 1.2.46 and 1.0.56 [July 9, 2011]
   Udated copyright year to 2011.
 
+version 1.2.47beta01 [February 17, 2012]
+  Updated contrib/pngminus/makefile.std (Samuli Souminen)
+
+version 1.0.57rc01 and 1.2.47rc01 [February 17, 2012]
+  Fixed CVE-2011-3026 buffer overrun bug.
+
+version 1.0.57 and 1.2.47 [February 18, 2012]
+  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
@@ -2732,4 +2741,4 @@
 or to glennrp at users.sourceforge.net
 
 Glenn R-P
-*/
+#endif
diff --git a/INSTALL b/INSTALL
index 5d0fc78..46f9c0c 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.56 - July 9, 2011
+Installing libpng version 1.0.57 - February 18, 2012
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -46,7 +46,7 @@
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.0.56" or "libpng10" and "zlib-1.2.3"
+might be called "libpng-1.0.57" or "libpng10" and "zlib-1.2.3"
 or "zlib123") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
diff --git a/KNOWNBUG b/KNOWNBUG
index 742bbad..5f93942 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.0.56
+Known bugs in libpng version 1.0.57
 
 1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
diff --git a/LICENSE b/LICENSE
index 22c28b8..5d7e4b4 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 1.0.56, July 9, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.57, February 18, 2012, 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 9, 2011
+February 18, 2012
diff --git a/Makefile.am b/Makefile.am
index 9719d99..443a5ac 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -89,7 +89,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.56.txt pnggccrd.c pngvcrd.c
+	example.c libpng-1.0.57.txt pnggccrd.c pngvcrd.c
 
 CLEANFILES= pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/Makefile.in b/Makefile.in
index d544c79..b3a662e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -354,7 +354,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.56.txt pnggccrd.c pngvcrd.c
+	example.c libpng-1.0.57.txt pnggccrd.c pngvcrd.c
 
 CLEANFILES = pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/README b/README
index e3b5618..b16f32d 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.0.56 - July 9, 2011 (shared library 10.0)
+README for libpng version 1.0.57 - February 18, 2012 (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.
@@ -199,11 +199,11 @@
        makefile.std     =>  Generic UNIX makefile (cc, creates static
                             libpng.a)
        makefile.elf     =>  Linux/ELF gcc makefile symbol versioning,
-                            creates libpng10.so.0.1.0.56)
+                            creates libpng10.so.0.1.0.57)
        makefile.linux   =>  Linux/ELF makefile (gcc, creates
-                            libpng10.so.0.1.0.56)
+                            libpng10.so.0.1.0.57)
        makefile.gcmmx   =>  Linux/ELF makefile (gcc, creates
-                            libpng10.so.0.1.0.56, previously
+                            libpng10.so.0.1.0.57, previously
                             used assembler code tuned for Intel MMX
                             platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static
@@ -228,12 +228,12 @@
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng10.so.0.1.0.56)
+                            (gcc, creates libpng10.so.0.1.0.57)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng10.so.0.1.0.56)
+                            (gcc, creates libpng10.so.0.1.0.57)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng10.so.0.1.0.56)
+                            (gcc, creates libpng10.so.0.1.0.57)
        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 cc9aaad..ae75b82 100644
--- a/Y2KINFO
+++ b/Y2KINFO
@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      July 9, 2011
+      February 18, 2012
 
       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 1.0.56 are Y2K compliant.  It is my belief that earlier
+      upward through 1.0.57 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 2714184..b411c15 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 1.0.56.
+# Generated by GNU Autoconf 2.65 for libpng 1.0.57.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -701,8 +701,8 @@
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.0.56'
-PACKAGE_STRING='libpng 1.0.56'
+PACKAGE_VERSION='1.0.57'
+PACKAGE_STRING='libpng 1.0.57'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1435,7 +1435,7 @@
   # 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 1.0.56 to adapt to many kinds of systems.
+\`configure' configures libpng 1.0.57 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1505,7 +1505,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.0.56:";;
+     short | recursive ) echo "Configuration of libpng 1.0.57:";;
    esac
   cat <<\_ACEOF
 
@@ -1612,7 +1612,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.0.56
+libpng configure 1.0.57
 generated by GNU Autoconf 2.65
 
 Copyright (C) 2009 Free Software Foundation, Inc.
@@ -2037,7 +2037,7 @@
 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 1.0.56, which was
+It was created by libpng $as_me 1.0.57, which was
 generated by GNU Autoconf 2.65.  Invocation command line was
 
   $ $0 $@
@@ -2845,7 +2845,7 @@
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.0.56'
+ VERSION='1.0.57'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2909,10 +2909,10 @@
 
 
 
-PNGLIB_VERSION=1.0.56
+PNGLIB_VERSION=1.0.57
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
-PNGLIB_RELEASE=56
+PNGLIB_RELEASE=57
 
 
 
@@ -12079,7 +12079,7 @@
 # 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 1.0.56, which was
+This file was extended by libpng $as_me 1.0.57, which was
 generated by GNU Autoconf 2.65.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -12145,7 +12145,7 @@
 cat >>$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 1.0.56
+libpng config.status 1.0.57
 configured by $0, generated by GNU Autoconf 2.65,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index b33a641..df2d19e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,15 +18,15 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.0.56], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.0.57], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.0.56
+PNGLIB_VERSION=1.0.57
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
-PNGLIB_RELEASE=56
+PNGLIB_RELEASE=57
 
 dnl End of version number stuff
 
diff --git a/contrib/pngminus/makefile.std b/contrib/pngminus/makefile.std
index 2fb061b..9a17169 100644
--- a/contrib/pngminus/makefile.std
+++ b/contrib/pngminus/makefile.std
@@ -8,9 +8,9 @@
 RM=rm -f
 
 #PNGPATH = /usr/local
-#PNGINC = -I$(PNGPATH)/include/libpng12
-#PNGLIB = -L$(PNGPATH)/lib -lpng12
-#PNGLIBS = $(PNGPATH)/lib/libpng12.a
+#PNGINC = -I$(PNGPATH)/include/libpng10
+#PNGLIB = -L$(PNGPATH)/lib -lpng10
+#PNGLIBS = $(PNGPATH)/lib/libpng10.a
 PNGINC = -I../..
 PNGLIB = -L../.. -lpng
 PNGLIBS = ../../libpng.a
@@ -23,9 +23,9 @@
 ZLIB = -L../../../zlib -lz
 ZLIBS = ../../../zlib/libz.a
 
-CFLAGS=-O3 $(PNGINC) $(ZINC)
-LDFLAGS=$(PNGLIB) $(ZLIB)
-LDFLAGSS=$(PNGLIBS) $(ZLIBS)
+CFLAGS=$(PNGINC) $(ZINC)
+LDLIBS=$(PNGLIB) $(ZLIB)
+LDLIBSS=$(PNGLIBS) $(ZLIBS)
 C=.c
 O=.o
 L=.a
@@ -40,19 +40,19 @@
 	$(CC) -c $(CFLAGS) png2pnm$(C)
 
 png2pnm$(E): png2pnm$(O)
-	$(LD) -o png2pnm$(E) png2pnm$(O) $(LDFLAGS) -lm
+	$(LD) $(LDFLAGS) -o png2pnm$(E) png2pnm$(O) $(LDLIBS) -lm
 
 png2pnm-static$(E): png2pnm$(O)
-	$(LD) -o png2pnm-static$(E) png2pnm$(O) $(LDFLAGSS) -lm
+	$(LD) $(LDFLAGS) -o png2pnm-static$(E) png2pnm$(O) $(LDLIBSS) -lm
 
 pnm2png$(O): pnm2png$(C)
 	$(CC) -c $(CFLAGS) pnm2png$(C)
 
 pnm2png$(E): pnm2png$(O)
-	$(LD) -o pnm2png$(E) pnm2png$(O) $(LDFLAGS) -lm
+	$(LD) $(LDFLAGS) -o pnm2png$(E) pnm2png$(O) $(LDLIBS) -lm
 
 pnm2png-static$(E): pnm2png$(O)
-	$(LD) -o pnm2png-static$(E) pnm2png$(O) $(LDFLAGSS) -lm
+	$(LD) $(LDFLAGS) -o pnm2png-static$(E) pnm2png$(O) $(LDLIBSS) -lm
 
 clean:
 	$(RM) png2pnm$(O)
diff --git a/libpng-1.0.56.txt b/libpng-1.0.57.txt
similarity index 99%
rename from libpng-1.0.56.txt
rename to libpng-1.0.57.txt
index e1bace6..9480014 100644
--- a/libpng-1.0.56.txt
+++ b/libpng-1.0.57.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.56 - July 9, 2011
+ libpng version 1.0.57 - February 18, 2012
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.56 - July 9, 2011
+ libpng versions 0.97, January 1998, through 1.0.57 - February 18, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -878,7 +878,7 @@
 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 1.0.56, not all possible expansions are supported.
+As of libpng version 1.0.57, 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
@@ -3076,13 +3076,13 @@
 
 XIII. Y2K Compliance in libpng
 
-July 9, 2011
+February 18, 2012
 
 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 1.0.56 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.57 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 ba5828b..d559c8b 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "July 9, 2011"
+.TH LIBPNG 3 "February 18, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.56
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.57
 .SH SYNOPSIS
 \fI\fB
 
@@ -821,7 +821,7 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.56 - July 9, 2011
+ libpng version 1.0.57 - February 18, 2012
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -832,7 +832,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.56 - July 9, 2011
+ libpng versions 0.97, January 1998, through 1.0.57 - February 18, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -1699,7 +1699,7 @@
 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 1.0.56, not all possible expansions are supported.
+As of libpng version 1.0.57, 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
@@ -3897,13 +3897,13 @@
 
 .SH XIII. Y2K Compliance in libpng
 
-July 9, 2011
+February 18, 2012
 
 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 1.0.56 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.57 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
@@ -4212,6 +4212,11 @@
  1.2.46rc01-02       13    10246  12.so.0.46[.0]
  1.0.56              10    10056  10.so.0.56[.0]
  1.2.46              13    10246  12.so.0.46[.0]
+ 1.2.47beta01        13    10247  12.so.0.47[.0]
+ 1.2.47rc01          13    10247  12.so.0.47[.0]
+ 1.0.57rc01          10    10057  10.so.0.57[.0]
+ 1.2.47              13    10247  12.so.0.47[.0]
+ 1.0.57              10    10057  10.so.0.57[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -4267,7 +4272,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.0.56 - July 9, 2011:
+Libpng version 1.0.57 - February 18, 2012:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4290,7 +4295,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.0.56, July 9, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.57, February 18, 2012, 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
@@ -4389,7 +4394,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-July 9, 2011
+February 18, 2012
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 60da7c8..6b56fc2 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "July 9, 2011"
+.TH LIBPNGPF 3 "February 18, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.56
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.57
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/png.5 b/png.5
index 20b584e..922eaf4 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "July 9, 2011"
+.TH PNG 5 "February 18, 2012"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 80434ad..c1d2054 100644
--- a/png.c
+++ b/png.c
@@ -17,7 +17,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_56 Your_png_h_is_not_version_1_0_56;
+typedef version_1_0_57 Your_png_h_is_not_version_1_0_57;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.
@@ -724,13 +724,13 @@
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version 1.0.56 - July 9, 2011" PNG_STRING_NEWLINE \
+     "libpng version 1.0.57 - February 18, 2012" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
-      return ((png_charp) "libpng version 1.0.56 - July 9, 2011\
+      return ((png_charp) "libpng version 1.0.57 - February 18, 2012\
       Copyright (c) 1998-2011 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 df36474..f082ef7 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.56 - July 9, 2011
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * libpng version 1.0.57 - February 18, 2012
+ * Copyright (c) 1998-2012 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 1.0.56 - July 9, 2011: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.57 - February 18, 2012: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -270,6 +270,11 @@
  *    1.2.46rc01-02           13    10246  12.so.0.46[.0]
  *    1.0.56                  10    10056  10.so.0.56[.0]
  *    1.2.46                  13    10246  12.so.0.46[.0]
+ *    1.2.47beta01            13    10247  12.so.0.47[.0]
+ *    1.2.47rc01              13    10247  12.so.0.47[.0]
+ *    1.0.57rc01              10    10057  10.so.0.57[.0]
+ *    1.2.47                  13    10247  12.so.0.47[.0]
+ *    1.0.57                  10    10057  10.so.0.57[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -301,7 +306,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.0.56, July 9, 2011, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.0.57, February 18, 2012, are
  * Copyright (c) 2004, 2006-2011 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:
@@ -413,13 +418,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    July 9, 2011
+ *    February 18, 2012
  *
  *    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 1.0.56 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.57 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
@@ -475,9 +480,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.56"
+#define PNG_LIBPNG_VER_STRING "1.0.57"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.56 - July 9, 2011\n"
+   " libpng version 1.0.57 - February 18, 2012\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  10
@@ -485,7 +490,7 @@
 /* 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 56
+#define PNG_LIBPNG_VER_RELEASE 57
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
@@ -515,7 +520,7 @@
  * 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 10056 /* 1.0.56 */
+#define PNG_LIBPNG_VER 10057 /* 1.0.57 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* Include the compression library's header */
@@ -1555,7 +1560,7 @@
 /* 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_56;
+typedef png_structp version_1_0_57;
 
 typedef png_struct FAR * FAR * png_structpp;
 
diff --git a/pngconf.h b/pngconf.h
index 59dab38..a81c005 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,8 +1,8 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.0.56 - July 9, 2011
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * libpng version 1.0.57 - February 18, 2012
+ * Copyright (c) 1998-2012 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/pngrutil.c b/pngrutil.c
index 45e7ddd..2139205 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,8 +1,8 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.45 [July 7, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.47 [February 18, 2012]
+ * Copyright (c) 1998-2012 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.)
  *
@@ -339,15 +339,18 @@
       /* Now check the limits on this chunk - if the limit fails the
        * compressed data will be removed, the prefix will remain.
        */
+      if (prefix_size >= (~(png_size_t)0) - 1 ||
+         expanded_size >= (~(png_size_t)0) - 1 - prefix_size
 #ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
-      if (png_ptr->user_chunk_malloc_max &&
+         || (png_ptr->user_chunk_malloc_max &&
           (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1))
 #else
 #  ifdef PNG_USER_CHUNK_MALLOC_MAX
-      if ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
+         || ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
           prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1)
 #  endif
 #endif
+          )
          png_warning(png_ptr, "Exceeded size limit while expanding chunk");
 
       /* If the size is zero either there was an error and a message
@@ -355,16 +358,13 @@
        * and we have nothing to do - the code will exit through the
        * error case below.
        */
-#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \
-    defined(PNG_USER_CHUNK_MALLOC_MAX)
-      else
-#endif
-      if (expanded_size > 0)
+      else if (expanded_size > 0)
       {
          /* Success (maybe) - really uncompress the chunk. */
          png_size_t new_size = 0;
+
          png_charp text = png_malloc_warn(png_ptr,
-                        prefix_size + expanded_size + 1);
+             prefix_size + expanded_size + 1);
 
          if (text != NULL)
          {
diff --git a/pngtest.c b/pngtest.c
index 4727ba8..68db5a1 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1702,4 +1702,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_56 your_png_h_is_not_version_1_0_56;
+typedef version_1_0_57 your_png_h_is_not_version_1_0_57;
diff --git a/projects/visualc6/README.txt b/projects/visualc6/README.txt
index bb5bcce..1c79551 100644
--- a/projects/visualc6/README.txt
+++ b/projects/visualc6/README.txt
@@ -4,13 +4,11 @@
 Copyright (C) 2004 Cosmin Truta.
 For conditions of distribution and use, see copyright notice in png.h
 
-
 Assumptions:
 * The libpng source files are in ..\..
 * The zlib source files are in ..\..\..\zlib
 * The zlib project files are in ..\..\..\zlib\projects\visualc6
 
-
 To use:
 
 1) On the main menu, select "File | Open Workspace".
@@ -28,7 +26,6 @@
 5) If you built the sample program (pngtest),
    select "Build | Execute ... (Ctrl+F5)".
 
-
 This project builds the libpng binaries as follows:
 
 * Win32_DLL_Release\libpng10.dll      DLL build
@@ -41,7 +38,6 @@
 * Win32_LIB_ASM_Release\libpng.lib    static build using ASM code
 * Win32_LIB_ASM_Debug\libpngd.lib     static build using ASM (debug version)
 
-
 Notes:
 
 If you change anything in the source files, or select different compiler
diff --git a/projects/visualc71/README_zlib.txt b/projects/visualc71/README_zlib.txt
index ff6a5c7..eee31ce 100644
--- a/projects/visualc71/README_zlib.txt
+++ b/projects/visualc71/README_zlib.txt
@@ -8,7 +8,6 @@
 Copyright (C) 2004 Cosmin Truta.
 For conditions of distribution and use, see copyright notice in zlib.h.
 
-
 To use:
 
 1) On the main menu, select "File | Open Solution".
diff --git a/projects/wince.txt b/projects/wince.txt
index 51dfc01..7cff760 100644
--- a/projects/wince.txt
+++ b/projects/wince.txt
@@ -1,6 +1,6 @@
 A set of project files is available for WinCE.  Get
-libpng-1.0.56-project-wince.zip from a libpng distribution
+libpng-1.0.57-project-wince.zip from a libpng distribution
 site such as http://libpng.sourceforge.net/index.html
 
 Put the zip file in this directory (projects) and then run
-"unzip -a libpng-1.0.56-project-wince.zip"
+"unzip -a libpng-1.0.57-project-wince.zip"
diff --git a/scripts/README.txt b/scripts/README.txt
index 358b858..f3b3c31 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,8 +1,8 @@
 
-Makefiles for  libpng version 1.0.56 - July 9, 2011
+Makefiles for  libpng version 1.0.57 - February 18, 2012
 
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng10.so.0.1.0.56)
+                       (gcc, creates libpng10.so.0.1.0.57)
  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 libpng10.so.0.1.0.56)
+                       gcc, creates libpng10.so.0.1.0.57)
  makefile.freebsd  =>  FreeBSD makefile
  makefile.gcc      =>  Generic gcc makefile
  makefile.gccmmx   =>  Generic gcc makefile previously using MMX code
@@ -38,14 +38,14 @@
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng10.so.0.1.0.56)
+                       creates libpng10.so.0.1.0.57)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng10.so.0.1.0.56)
+                       creates libpng10.so.0.1.0.57)
  makefile.solaris-x86  =>  Solaris 2.X makefile (gcc, no MMX code,
-                       creates libpng10.so.0.1.0.56)
+                       creates libpng10.so.0.1.0.57)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng10.so.0.1.0.56)
+                       creates libpng10.so.0.1.0.57)
  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 9a05920..e9a4d44 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.0.56
+version=1.0.57
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index a4adacd..67c357b 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.0.56
+Version: 1.0.57
 Libs: -L${libdir} -lpng10
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index 8c3c5da..a27c062 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index 3440fe9..0d21156 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index a6207c0..2514680 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -23,7 +23,7 @@
 
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index 6176c87..bb68b27 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.cegcc b/scripts/makefile.cegcc
index b09378e..d3d1d59 100644
--- a/scripts/makefile.cegcc
+++ b/scripts/makefile.cegcc
@@ -23,7 +23,7 @@
 
 VERMAJ = 1
 VERMIN = 0
-VERMIC = 56
+VERMIC = 57
 VER = $(VERMAJ).$(VERMIN).$(VERMIC)
 NAME = libpng
 PACKAGE = $(NAME)-$(VER)
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index 8c08686..473f723 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -77,7 +77,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 CYGDLL = 10
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index 7b74016..bcbee20 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -22,7 +22,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 10
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index 368b1d4..8a57656 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index a705a97..31a0e8a 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -16,7 +16,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index 70659cd..ec38c0c 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -17,7 +17,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index 5586470..9928303 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -21,7 +21,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index cad1030..122e831 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index a0467d1..cf2211e 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -21,7 +21,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index 7350c86..b0a045e 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index b96b1fd..e0dad08 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -81,7 +81,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 MINGDLL = 10
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index fd30560..f3d7724 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png10
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.56
+SHLIB_MINOR=	1.0.57
 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 7b9c328..f2a7b76 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.0.56
+SHLIB_MINOR=	1.0.57
 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 7842215..20b5a81 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 9368592..d96779a 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.56
+SHLIB_MINOR=	1.0.57
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index 74a0691..84ce68d 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index 0be6ce7..0d459dc 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index 518243f..1df0dc8 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index 8ede403..016cdb5 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -11,7 +11,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index 6ea8529..6a1b345 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.solaris-x86 b/scripts/makefile.solaris-x86
index 9023e6a..76f07f9 100644
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.56
+PNGMIN = 1.0.57
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/png32ce.def b/scripts/png32ce.def
index e6d58f5..f009f11 100644
--- a/scripts/png32ce.def
+++ b/scripts/png32ce.def
@@ -5,7 +5,7 @@
 LIBRARY lpngce
 
 EXPORTS
-;Version 1.0.56
+;Version 1.0.57
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index b223620..25d4ab5 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.0.56
+; Version 1.0.57
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngw32.def b/scripts/pngw32.def
index 42b6db1..002e6b7 100644
--- a/scripts/pngw32.def
+++ b/scripts/pngw32.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.0.56
+;Version 1.0.57
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3