Please bump games-puzzle/gfifteen from 0.10.2 to 1.0. The newer version features multiple tile set selection (with three additional tile sets), as well as an "About" dialog menu option which provides information about the software. The 0.10.2 requires no adjustments except for an the version number needs to be incremented. Tested on a amd64 gentoo machine with Xfce4. I should note that this release does not fix bug 411185. However, bug 411185 is restricted to hardened amd64 systems. I'll make a separate bug fix release after reproducing the problem and testing the fix on one of my own hardened systems. So please do not hold up the release of 1.0 on account of it.
Would be nice if the next release included the sed patch from the ebuild: sed -i -e "/Encoding/d" gfifteen.desktop
in portage.