Incompatible libpng version in application and library May 24, 2010 • SAWP Gnome showing the following error? Fatal error in PNG image file: Incompatible libpng version in application and library Try: <br /> sudo ln -s /usr/local/lib/libpng.so.6 /usr/local/lib/libpng.so.5<br /> That solved at Gnome 2.30 on FreeBSD 8.