Some leftover from cancelled upgrade to 2.2? Try http://bugs.gentoo.org/buglist.cgi?query_format=advanced&short_desc_type=allwordssubstr&short_desc=&long_desc_type=allwordssubstr&long_desc=&bug_file_loc_type=allwordssubstr&bug_file_loc=&status_whiteboard_type=allwordssubstr&status_whiteboard=&keywords_type=allwords&keywords=&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&emailassigned_to1=1&emailtype1=substring&email1=&emailassigned_to2=1&emailreporter2=1&emailcc2=1&emailtype2=substring&email2=docs-team&bugidtype=include&bug_id=&chfieldfrom=&chfieldto=Now&chfieldvalue=&field0-0-0=noop&type0-0-0=noop&value0-0-0=&order=bugs.bug_id&tweak=1
This is remnant of the borked update to 2.20. Not sure why it's still happening. I have setup 2.20 at home at which I've gotten a complete upgrade working. so I will be testing this and making sure it works completely, then i'll schedule more downtime.
Also http://bugs.gentoo.org/userprefs.cgi?tab=settings does not really work...