fedora 17- libpng.so missing

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http://forums.fedoraforum.org – i want install a program but have 1 error as below : libpng.so Unable to find the above mentioned packages installed in your machine. Kindly ensure that the packages are installed and then Press (C) to Continue with installation (Q) to Quit Installation and the press ENTER what should I do? I tried find the libpng.so package but dunno where can download and install. Anyone can tell me? Appreciate those can help me. Thanks. (HowTos)