if xscreensaver 4.20 is installed and you emerge kde to version 3.4.2 it will fail the xscreensaver test. emerge -uD kde will update xscreensaver and fix problem. the update should probably be required in the ebuild. I am on an amd64 but I don't think this would be specific to my platform. Reproducible: Didn't try Steps to Reproduce: 1. 2. 3.
Should be fixed if you try again after a sync.