diff --git a/ANNOUNCE b/ANNOUNCE
index 34bc017..525afb8 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.8beta01 - December 21, 2011
+Libpng 1.5.8beta01 - January 15, 2012
 
 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.
@@ -26,9 +26,13 @@
 
 Changes since the last public release (1.5.7):
 
-Version 1.5.8beta01 [December 21, 2011]
+Version 1.5.8beta01 [January 15, 2012]
   Removed '#include config.h"' from contrib/libtests/pngvalid.c.  It's not
     needed and causes trouble for VPATH building.
+  Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper
+    location in configure.ac (Gilles Espinasse).
+  Fix bug in pngerror.c: some long warnings were being improperly truncated
+    (bug introduced in libpng-1.5.3beta05).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 35df4ce..9f8b838 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3776,9 +3776,13 @@
   Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings
     reported by earlier versions.
 
-Version 1.5.8beta01 [December 21, 2011]
+Version 1.5.8beta01 [January 15, 2012]
   Removed '#include config.h"' from contrib/libtests/pngvalid.c.  It's not
     needed and causes trouble for VPATH building.
+  Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper
+    location in configure.ac (Gilles Espinasse).
+  Fix bug in pngerror.c: some long warnings were being improperly truncated
+    (bug introduced in libpng-1.5.3beta05).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87cb16d..f1c600f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,7 +35,7 @@
 
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 5)
-set(PNGLIB_RELEASE 7)
+set(PNGLIB_RELEASE 8)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
 
@@ -229,7 +229,7 @@
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 15.${PNGLIB_RELEASE}.1.5.7
+#   VERSION 15.${PNGLIB_RELEASE}.1.5.8beta01
     VERSION 15.${PNGLIB_RELEASE}.0
     SOVERSION 15
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/LICENSE b/LICENSE
index e23bca4..c226242 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 1.5.7, December 15, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.8beta01, January 15, 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
@@ -108,4 +108,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-December 15, 2011
+January 15, 2012
diff --git a/README b/README
index ec6a6a2..50ad789 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.7 - December 15, 2011 (shared library 15.0)
+README for libpng version 1.5.8beta01 - January 15, 2012 (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 0eb468b..5ffac56 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.68 for libpng 1.5.7.
+# Generated by GNU Autoconf 2.68 for libpng 1.5.8beta01.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -570,8 +570,8 @@
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.5.7'
-PACKAGE_STRING='libpng 1.5.7'
+PACKAGE_VERSION='1.5.8beta01'
+PACKAGE_STRING='libpng 1.5.8beta01'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1320,7 +1320,7 @@
   # 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 1.5.7 to adapt to many kinds of systems.
+\`configure' configures libpng 1.5.8beta01 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1390,7 +1390,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.5.7:";;
+     short | recursive ) echo "Configuration of libpng 1.5.8beta01:";;
    esac
   cat <<\_ACEOF
 
@@ -1501,7 +1501,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.5.7
+libpng configure 1.5.8beta01
 generated by GNU Autoconf 2.68
 
 Copyright (C) 2010 Free Software Foundation, Inc.
@@ -1924,7 +1924,7 @@
 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 1.5.7, which was
+It was created by libpng $as_me 1.5.8beta01, which was
 generated by GNU Autoconf 2.68.  Invocation command line was
 
   $ $0 $@
@@ -2739,7 +2739,7 @@
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.5.7'
+ VERSION='1.5.8beta01'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2803,10 +2803,10 @@
 
 
 
-PNGLIB_VERSION=1.5.7
+PNGLIB_VERSION=1.5.8beta01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
-PNGLIB_RELEASE=7
+PNGLIB_RELEASE=8
 
 
 
@@ -13414,7 +13414,7 @@
 # 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 1.5.7, which was
+This file was extended by libpng $as_me 1.5.8beta01, which was
 generated by GNU Autoconf 2.68.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13480,7 +13480,7 @@
 cat >>$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 1.5.7
+libpng config.status 1.5.8beta01
 configured by $0, generated by GNU Autoconf 2.68,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 550553e..0110822 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,15 +18,15 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.5.7], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.5.8beta01], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.5.7
+PNGLIB_VERSION=1.5.8beta01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
-PNGLIB_RELEASE=7
+PNGLIB_RELEASE=8
 
 dnl End of version number stuff
 
@@ -101,8 +101,6 @@
 LIBPNG_DEFINES=$LIBPNG_DEFINES
 AC_SUBST(LIBPNG_DEFINES)
 
-AC_MSG_CHECKING([if libraries can be versioned])
-
 AC_MSG_CHECKING([if using Solaris linker])
 SLD=`$LD --version 2>&1 | grep Solaris`
 if test "$SLD"; then
@@ -114,6 +112,7 @@
 fi
 AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
 
+AC_MSG_CHECKING([if libraries can be versioned])
 # Special case for PE/COFF platforms: ld reports
 # support for version-script, but doesn't actually
 # DO anything with it.
diff --git a/contrib/libtests/pngvalid.c b/contrib/libtests/pngvalid.c
index af586f5..3dd6f21 100644
--- a/contrib/libtests/pngvalid.c
+++ b/contrib/libtests/pngvalid.c
@@ -2,7 +2,7 @@
 /* pngvalid.c - validate libpng by constructing then reading png files.
  *
  * Last changed in libpng 1.5.8 [%RDATE%]
- * Copyright (c) 2011 Glenn Randers-Pehrson
+ * Copyright (c) 2012 Glenn Randers-Pehrson
  * Written by John Cunningham Bowler
  *
  * This code is released under the libpng license.
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 59690d2..6a0e41e 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 1.5.7 - December 15, 2011
+ libpng version 1.5.8beta01 - January 15, 2012
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.7 - December 15, 2011
+ libpng versions 0.97, January 1998, through 1.5.8beta01 - January 15, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
@@ -4573,13 +4573,13 @@
 
 XIV. Y2K Compliance in libpng
 
-December 15, 2011
+January 15, 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 1.5.7 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.8beta01 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 0d22762..f260c7f 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "December 15, 2011"
+.TH LIBPNG 3 "January 15, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.7
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.8beta01
 .SH SYNOPSIS
 \fI\fB
 
@@ -977,7 +977,7 @@
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.7 - December 15, 2011
+ libpng version 1.5.8beta01 - January 15, 2012
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -988,7 +988,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.7 - December 15, 2011
+ libpng versions 0.97, January 1998, through 1.5.8beta01 - January 15, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
@@ -5551,13 +5551,13 @@
 
 .SH XIV. Y2K Compliance in libpng
 
-December 15, 2011
+January 15, 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 1.5.7 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.8beta01 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
@@ -5762,6 +5762,7 @@
  1.5.7beta01-05      15    10507  15.so.15.7[.0]
  1.5.7rc01-03        15    10507  15.so.15.7[.0]
  1.5.7               15    10507  15.so.15.7[.0]
+ 1.5.8beta01         15    10508  15.so.15.8[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -5818,7 +5819,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.7 - December 15, 2011:
+Libpng version 1.5.8beta01 - January 15, 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).
 
@@ -5841,7 +5842,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.7, December 15, 2011, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.8beta01, January 15, 2012, 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
@@ -5940,7 +5941,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-December 15, 2011
+January 15, 2012
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 12a1677..ca183fb 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "December 15, 2011"
+.TH LIBPNGPF 3 "January 15, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.7
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.8beta01
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"
diff --git a/png.5 b/png.5
index 7d1c12b..54285d9 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "December 15, 2011"
+.TH PNG 5 "January 15, 2012"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 0807448..2c038d4 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_7 Your_png_h_is_not_version_1_5_7;
+typedef png_libpng_version_1_5_8beta01 Your_png_h_is_not_version_1_5_8beta01;
 
 /* 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
@@ -655,13 +655,13 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.5.7 - December 15, 2011" PNG_STRING_NEWLINE \
+     "libpng version 1.5.8beta01 - January 15, 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 "libpng version 1.5.7 - December 15, 2011\
+      return "libpng version 1.5.8beta01 - January 15, 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 e22ec5c..d711c13 100644
--- a/png.h
+++ b/png.h
@@ -1,8 +1,8 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.7 - December 15, 2011
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * libpng version 1.5.8beta01 - January 15, 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.)
  *
@@ -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 1.5.7 - December 15, 2011: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.8beta01 - January 15, 2012: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -166,6 +166,7 @@
  *    1.5.7beta01-05          15    10507  15.so.15.7[.0]
  *    1.5.7rc01-03            15    10507  15.so.15.7[.0]
  *    1.5.7                   15    10507  15.so.15.7[.0]
+ *    1.5.8beta01             15    10508  15.so.15.8[.0]
  *
  *   Henceforth the source version will match the shared-library major
  *   and minor numbers; the shared-library major version number will be
@@ -197,8 +198,8 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.7, December 15, 2011, are
- * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.8beta01, January 15, 2012, are
+ * Copyright (c) 2004, 2006-2012 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:
  *
@@ -309,13 +310,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    December 15, 2011
+ *    January 15, 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 1.5.7 are Y2K compliant.  It is my belief that
+ *    upward through 1.5.8beta01 are Y2K compliant.  It is my belief that
  *    earlier versions were also Y2K compliant.
  *
  *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -373,9 +374,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.7"
+#define PNG_LIBPNG_VER_STRING "1.5.8beta01"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.7 - December 15, 2011\n"
+     " libpng version 1.5.8beta01 - January 15, 2012\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
@@ -383,13 +384,13 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   5
-#define PNG_LIBPNG_VER_RELEASE 7
+#define PNG_LIBPNG_VER_RELEASE 8
 
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  0
+#define PNG_LIBPNG_VER_BUILD  01
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -414,7 +415,7 @@
  * 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 10507 /* 1.5.7 */
+#define PNG_LIBPNG_VER 10508 /* 1.5.8 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
@@ -536,7 +537,7 @@
 /* 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_7;
+typedef char* png_libpng_version_1_5_8beta01;
 
 /* 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 d07054d..ed4e389 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,9 +1,9 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.7 - December 15, 2011
+ * libpng version 1.5.8beta01 - January 15, 2012
  *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * 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/pngerror.c b/pngerror.c
index 7604bdd..e53da05 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -284,32 +284,35 @@
    /* The internal buffer is just 128 bytes - enough for all our messages,
     * overflow doesn't happen because this code checks!
     */
-   size_t i;
+   size_t i = 0; /* Index in the msg[] buffer: */
    char msg[128];
 
-   for (i=0; i<(sizeof msg)-1 && *message != '\0'; ++i)
+   /* Each iteration through the following loop writes at most one character
+    * to msg[i++] then returns here to validate that there is still space for
+    * the trailing '\0'.  It may (in the case of a parameter) read more than
+    * one character from message[]; it must check for '\0' and continue to the
+    * test if it finds the end of string.
+    */
+   while (i<(sizeof msg)-1 && *message != '\0')
    {
-      if (*message == '@')
+      /* '@' at end of string is now just printed (previously it was skipped);
+       * it is an error in the calling code to terminate the string with @.
+       */
+      if (p != NULL && *message == '@' && message[1] != '\0')
       {
-         int parameter = -1;
-         switch (*++message)
-         {
-            case '1':
-               parameter = 0;
-               break;
+         int parameter_char = *++message; /* Consume the '@' */
+         static const char valid_parameters[] = "123456789";
+         int parameter = 0;
 
-            case '2':
-               parameter = 1;
-               break;
+         /* Search for the parameter digit, the index in the string is the
+          * parameter to use.
+          */
+         while (valid_parameters[parameter] != parameter_char &&
+            valid_parameters[parameter] != '\0')
+            ++parameter;
 
-            case '\0':
-               continue; /* To break out of the for loop above. */
-
-            default:
-               break;
-         }
-
-         if (parameter >= 0 && parameter < PNG_WARNING_PARAMETER_COUNT)
+         /* If the parameter digit is out of range it will just get printed. */
+         if (parameter < PNG_WARNING_PARAMETER_COUNT)
          {
             /* Append this parameter */
             png_const_charp parm = p[parameter];
@@ -319,28 +322,32 @@
              * that parm[] has been initialized, so there is no guarantee of a
              * trailing '\0':
              */
-            for (; i<(sizeof msg)-1 && parm != '\0' && parm < pend; ++i)
-               msg[i] = *parm++;
+            while (i<(sizeof msg)-1 && *parm != '\0' && parm < pend)
+               msg[i++] = *parm++;
 
+            /* Consume the parameter digit too: */
             ++message;
             continue;
          }
 
          /* else not a parameter and there is a character after the @ sign; just
-          * copy that.
+          * copy that.  This is known not to be '\0' because of the test above.
           */
       }
 
       /* At this point *message can't be '\0', even in the bad parameter case
        * above where there is a lone '@' at the end of the message string.
        */
-      msg[i] = *message++;
+      msg[i++] = *message++;
    }
 
    /* i is always less than (sizeof msg), so: */
    msg[i] = '\0';
 
-   /* And this is the formatted message: */
+   /* And this is the formatted message, it may be larger than
+    * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these are
+    * not (currently) formatted.
+    */
    png_warning(png_ptr, msg);
 }
 #endif /* PNG_WARNINGS_SUPPORTED */
diff --git a/pngtest.c b/pngtest.c
index c52aef3..1f964e5 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1817,4 +1817,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_7 Your_png_h_is_not_version_1_5_7;
+typedef png_libpng_version_1_5_8beta01 Your_png_h_is_not_version_1_5_8beta01;
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index a18faa1..4405cf4 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.7 - December 15, 2011
+libpng version 1.5.8beta01 - January 15, 2012
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index c13867c..46378fe 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.7 - December 15, 2011
+ * libpng version 1.5.8beta01 - January 15, 2012
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 485aba2..032a57d 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,9 +1,9 @@
 
-Makefiles for  libpng version 1.5.7 - December 15, 2011
+Makefiles for  libpng version 1.5.8beta01 - January 15, 2012
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng15.so.15.1.5.7)
+                       (gcc, creates libpng15.so.15.1.5.8beta01)
  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.15.1.5.7)
+                       (gcc, creates libpng15.so.15.1.5.8beta01)
  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.15.1.5.7)
+                       creates libpng15.so.15.1.5.8beta01)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng15.so.15.1.5.7)
+                       creates libpng15.so.15.1.5.8beta01)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng15.so.15.1.5.7)
+                       creates libpng15.so.15.1.5.8beta01)
  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 49a9339..c1065ab 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.5.7
+version=1.5.8beta01
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 3ec77d6..3213064 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.5.7
+Version: 1.5.8beta01
 Libs: -L${libdir} -lpng15
 Cflags: -I${includedir}
diff --git a/scripts/makefile.cegcc b/scripts/makefile.cegcc
index 624fbaa..de898f3 100644
--- a/scripts/makefile.cegcc
+++ b/scripts/makefile.cegcc
@@ -23,7 +23,7 @@
 
 VERMAJ = 1
 VERMIN = 5
-VERMIC = 7
+VERMIC = 8
 VER = $(VERMAJ).$(VERMIN).$(VERMIC)
 NAME = libpng
 PACKAGE = $(NAME)-$(VER)
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index 8e3991a..3601e45 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng15
 PNGMAJ = 15
-RELEASE = 7
+RELEASE = 8
 
 # Shared library names:
 LIBSO=$(LIBNAME).so
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index e534a01..ea75864 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png15
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.5.7
+SHLIB_MINOR=	1.5.8beta01
 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 262bdbd..50bbb1a 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	15
-SHLIB_MINOR=	1.5.7
+SHLIB_MINOR=	1.5.8beta01
 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 ad2b874..9e3ba0c 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	15
-SHLIB_MINOR=	1.5.7
+SHLIB_MINOR=	1.5.8beta01
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 0a79991..d7ab441 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -3,7 +3,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng 1.5.7 - December 15, 2011 */
+/* Libpng 1.5.8beta01 - January 15, 2012 */
 
 /* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
 
diff --git a/scripts/symbols.def b/scripts/symbols.def
index a2f15e4..3c439e5 100644
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.5.7
+;Version 1.5.8beta01
  png_access_version_number @1
  png_set_sig_bytes @2
  png_sig_cmp @3