Last modified: 2007-09-25 11:38:30 UTC
It seems the "renameuserlogpage" message is not showing up properly on [[Special:Log]]. The cause seems likely to be r25997, which delays loading of the relevant message file until [[Special:Renameuser]] is actually accessed. I'd revert the change myself, but I'm not at home right now and can't access svn from here.
Fixed in r26105.