When using nfsv4 some daemons are still called rpc.something although not portmap nor remote procedure call is actually performed. This is confusing, suggestion is to drop the rpc prefix and, maybe, suing the nfs prefix instead.
This bug appears to have been reported against 'rawhide' during the Fedora 13 development cycle. Changing version to '13'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
I ran this suggestion by upstream and the idea was shoot down... So I'm going to close this.. feel free to reopen...