Have your admins restarted the webserver? It definitely sounds like you have some corruption going on. The strange thing is that the queries are exactly the same between the PHP and PERL version. Do you actually have users accessing the PHP forums or are they still using the PERL ones?
I've been looking for a common thread on deja to see what the problem might be. Any idea of the mysql version you are running, and what version of php?
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Rick Baker
UBBThreads developer
