[Lynne]

I don't know which hooks to look for. I'd just go looking at the modifications. Any sort of modification that has to do with changing a users usergroup would be suspect to me. Create a test account, put him in the usergroup that your users are in, add a secondary usergroup to it, then try changing your email. See what happens. If you got put into a moderated group, undo the damage. Now, turn off one of your suspect modifications and then go change your email. See what happens. etc, etc, etc