Like bug #481798 , for F10 and guidance, F-9 needs a similar workaround for the default kpowersave.
Should be easy enough to adjust our existing default_applets patch to look for kpowersave-autostart.desktop too.
should be fixed in kdebase-workspace-4.2.0-4.2
Fixed in the latest 4.2 testing update, 4.1 not affected, closing.