OK I found it, just took a while. So I will turn that off in my forums, that might help a bit.
At this point I have upgraded MySQL to the latest, upgraded PHP to the latest in its line, added FastCGI, and converted one of my forums to InnoDB (all except the posts table which wouldn't convert). It seems to be running without any errors.
I'll test for a day and then tomorrow night I'll convert the others to InnoDB. Somehow I need to get these sped up a bit.
