I followed the upgrade instructions and everything SEEMED to work until I tried to click on any topic.  Then I got this message:

The error occurred on line 116 in /var/www/forums/viewforum.php

Something about the database being corrupt or a logic error.

This only happens to logged-in users.  Guest users have no problems traversing the forum.

I noticed that another post here closed an issue exactly like this.  I can not use her solution, however, since my forums are active and I simply can't delete/reinstantiate all my topics.

Any ideas?