For versions 1.*, digikam and kipi-plugins were keyworded ~ppc. With the big rewrite for version 2, that keyword was dropped. It looks like noone has missed it so far.
* either keyword media-gfx/digikam-2.4.1, media-plugins/kipi-plugins-2.4.1, and deps,
* or indicate that you want to drop ~ppc keyword for both
I'd like to remove the old version soon.
All old versions with ~ppc have been dropped.