I downloaded libpng 1.2.5 recently as well as the latest zlib (1.2.1). I built zlib with no problems, but when I went to build libpng, I received errors about not being able to find certain functions. When looking back at the zlib source, it appears that the functions libpng needed from zlib (I don't remember the function names, sorry..) are no longer in the latest version of zlib. These are my two questions: does anyone know if libpng is being updated to work with the latest zlib, and does anyone know the latest version of zlib that will work when compiling libpng?