in the current ebuild of totem 2.18.x the GCONF variable gets deleted when the gnome useflag is true. the patch is for the totem-2.18.3.ebuild and I used the fixed in my overlay ever since xine support was dropped. Reproducible: Always
Created attachment 130089 [details, diff] totem-2.18.3.ebuild.patch
fixed in CVS without bumping as discussed with dang, thanks for reporting.