Typo "unsusbscribe" in tor-talk footer
The bottom of every tor-talk mail says
tor-talk mailing list - email@example.com To unsusbscribe or change other settings go to https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-talk
This typo appeared on 23 July 2013.
I haven't checked all the other lists, but I think it was added to just this one.