I've turned off quick links for everybody, as I'm more and more certain that it's strategic combinations of old-time, non-forum-marking-read people hitting the index page that's causing our mysql to end up stacking up.
FYI/FWIW, I haven't seen any of the oddities since you made that change. Seems like a reasonable theory to me! Thanks.
i think he was labeled as a guest commentator rather than a contributer. If you look the guest commentator is a rank based title assigned by the number of posts a user has. Also great job on the clean up Guru!