The directory /usr/portage/kde-apps/koffice seems to be have been left...
kde-apps no longer exists ... try `emerge --clean rsync` or `rm -rf /usr/portage/kde-apps ; emerge rsync` and see if it still exists
Oh, I'm terribly sorry. I guess that's because `emerge --clean rsync` only removes old files and not directories... Isn't that a bit bad? It kind of means that I have to do `rm -rf /usr/portage; emerge rsync` if I want to be 100% updated.