When attempting to update to unrar-3.6.4, portage announces the following: Calculating world dependencies ...done! >>> emerge (1 of 1) app-arch/unrar-3.6.2 to / !!! Security Violation: A file exists that is not in the manifest. !!! File: files/digest-unrar-3.6.4 Apologies if this is a dupe, but I did search first and found nothing.
Hmm, odd. Syncing for a second time seems to have fixed it. Sorry.