Yup. Did all you said (and no, ran uprade before logging in).
I think I MAY have found out. It seems that most of the ones I've tracked so far are having errors due to members whom I had changed their username (by the method stated in the forums here). for example, I changed user1 to username2. the old user1 names were just listed as unregistered. But now they seem to be causing troubles.
Ryan.
