This package has not been built since Fedora 15, having failed multiple mass rebuild cycles. As part of the normal process for retiring packages that have not successfully built, this package is scheduled to be removed from Fedora on or around the Fedora 18 branch date (August 7th). Please fix this as soon as possible.
The FTBFS issue appears to be caused by libpng no longer allowing direct access to its struct png_info. I can supply a patch to fix that, if the package maintainer is interested in keeping this package alive. However, considering the lack of upstream activity, maybe there is no interest?
This package has now been retired.