diff --git a/libpng-1.6.2.tar.bz2 b/libpng-1.6.2.tar.bz2
deleted file mode 100644
index ba9cc83..0000000
--- a/libpng-1.6.2.tar.bz2
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7fbba66ad77bfe03f4a47a4333263f46fa1d4c74c313ea1b62800df21aa4aafb
-size 1024433
diff --git a/libpng-1.6.3.tar.xz b/libpng-1.6.3.tar.xz
new file mode 100644
index 0000000..c8690eb
--- /dev/null
+++ b/libpng-1.6.3.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c5ecc0d38663b944a828145ed59cf15dfbad2217512875bc05ecf9b92afa0f45
+size 869244
diff --git a/libpng-1.6.3.tar.xz.asc b/libpng-1.6.3.tar.xz.asc
new file mode 100644
index 0000000..5d7e9b2
--- /dev/null
+++ b/libpng-1.6.3.tar.xz.asc
@@ -0,0 +1,17 @@
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diff --git a/libpng16.keyring b/libpng16.keyring
new file mode 100644
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+++ b/libpng16.keyring
@@ -0,0 +1,91 @@
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diff --git a/libpng16.spec b/libpng16.spec
index 848807a..a0c2624 100644
--- a/libpng16.spec
+++ b/libpng16.spec
@@ -19,7 +19,7 @@
 #
 %define major   1
 %define minor   6
-%define micro   2
+%define micro   3
 %define branch  %{major}%{minor}
 %define libname libpng%{branch}-%{branch}
 
@@ -30,8 +30,14 @@ Release:        0
 Summary:        Library for the Portable Network Graphics Format (PNG)
 License:        Zlib
 Group:          System/Libraries
-Source:         libpng-%{version}.tar.bz2
-Source2:        baselibs.conf
+Source0:        ftp://ftp.simplesystems.org/pub/png/src/libpng16/libpng-%{version}.tar.xz
+Source1:        ftp://ftp.simplesystems.org/pub/png/src/libpng16/Gnupg/libpng-%{version}.tar.xz.asc
+Source2:        libpng16.keyring
+Source3:        rpm-macros.libpng-tools
+Source4:        baselibs.conf
+%if 0%{?suse_version} >= 1230
+BuildRequires:  gpg-offline
+%endif
 BuildRequires:  libtool
 BuildRequires:  pkg-config
 BuildRequires:  zlib-devel
@@ -72,6 +78,12 @@ Provides:       libpng-devel = %{version}
 Obsoletes:      libpng-devel < 1.2.44
 Conflicts:      otherproviders(libpng-devel)
 
+%package tools
+Summary:        Tools for Manipulating PNG Images
+Group:          Productivity/Graphics/Other
+Provides:       libpng-tools = %{version}
+Conflicts:      otherproviders(libpng-tools)
+
 %description
 libpng is the official reference library for the Portable Network
 Graphics format (PNG).
@@ -94,7 +106,12 @@ to the header files, libraries, configuration files and development
 tools necessary for compiling and linking programs that don't care 
 about libpng version.
 
+%description tools
+Package consists of low level tools for manipulating and fixing particular
+PNG files.
+
 %prep
+%{?gpg_verify: %gpg_verify %{SOURCE1}}
 %setup -n libpng-%{version}
 
 %build
@@ -112,6 +129,9 @@ make check
 %install
 make install DESTDIR=$RPM_BUILD_ROOT 
 rm $RPM_BUILD_ROOT/%{_libdir}/libpng*.la
+mkdir -p %{buildroot}%{_sysconfdir}/rpm
+cp -a %{SOURCE3} \
+      %{buildroot}%{_sysconfdir}/rpm/macros.libpng-tools
 
 %post -n %{libname} -p /sbin/ldconfig
 
@@ -139,4 +159,10 @@ rm $RPM_BUILD_ROOT/%{_libdir}/libpng*.la
 %doc %{_mandir}/man3/libpngpf.3.gz
 %doc %{_mandir}/man5/png.5.gz
 
+%files tools
+%defattr(-,root,root)
+%{_bindir}/png-fix-itxt
+%{_bindir}/pngfix
+%{_sysconfdir}/rpm/macros.libpng-tools
+
 %changelog
diff --git a/rpm-macros.libpng-tools b/rpm-macros.libpng-tools
new file mode 100644
index 0000000..3e4499a
--- /dev/null
+++ b/rpm-macros.libpng-tools
@@ -0,0 +1,41 @@
+# macro: %png_fix_too_far_back path/to/name-of.png
+#        for given png, fixes 'IDAT: invalid distance too far back'
+#
+#     -v output if macro fixed something or find unrecoverable error
+#
+%png_fix_too_far_back(v) \
+  if test "x%1" == "x%%1"; then \
+    echo "Missing argument in call to %%png_fix_too_far_back: path and name of png file." \
+    exit 1 \
+  fi \
+  /usr/bin/png-fix-too-far-back "%1" \
+  case $? in \
+    0) # no need to fix \
+      ;; \
+    1) /usr/bin/png-fix-too-far-back -i "%1" \
+       %{-v: echo "fixed: %1" } \
+      ;; \
+    2) %{-v: echo "unrecoverable error: %1" } \
+      ;; \
+    3) echo "%1 not found" \
+      ;; \
+  esac \
+  %nil
+#
+# macro: %png_fix_too_far_back dir
+#        for given directory, search *.png (recursively) and potentionaly
+#        fix 'IDAT: invalid distance too far back'
+#
+#     -v output if macro fixed something or find unrecoverable error
+#
+%png_fix_too_far_back_dir(v) \
+  if test "x%1" == "x%%1"; then \
+    echo "Missing argument in call to %%png_fix_too_far_back_dir: dir where to search png files." \
+    exit 1 \
+  fi \
+  for png in `find "%1" -iname '*.png'`; do \
+    # -v will be propagated \
+    %png_fix_too_far_back $png \
+  done \
+  %nil
+