Hello, I've removed the ppc64 keyword from gnome-base/gnome-2.18.0 because you don't have gnome-power-manager-2.18.x keyworded due to bug 176380. So once that bug is solved please try to rekeyword gnome-extra/gnome-power-manager-2.18.x and gnome-base/gnome-2.18.x (the latest of 2.18 series that has been added by the time).
ok. we have 'fixed' the gnome-2.18.0 keywording in bug #199218. *** This bug has been marked as a duplicate of bug 199218 ***