The change in version 1.2.41beta08 caused transparency to be handled wrong
in some 16-bit datastreams (Yusaku Sugai).

from contrib/pngminim/*/makefile

    to put png.h and pngconf.h in $prefix/include, like the other scripts,
    instead of in $prefix/include/libpng.

    to pngconf.h in version 1.2.41.

about deprecated function use and deprecated structure access unless the
user defines PNG_PEDANTIC_WARNINGS.  Added "#define PNG_NO_PEDANTIC_WARNINGS"
in the libpng source files.  Removed "-DPNG_CONFIGURE_LIBPNG" from the
makefiles and projects since the warnings no longer depend on this.

in Makefile.ac and Makefile.in

  into scripts/README.txt
  and updated the copyright year in scripts/pngw32.rc from 2004 to 2009.

These functions won't be exported until libpng-1.4.0

in contrib/pngminim/*/gather.sh