HTTP 500 Internal Server Error !!

[SilverBoy]

Hi

Iam using vBulletin from version 1.1.3 , and if I remeber I get this error from the begining of vb3 generation, I asked about it in vbulletin.com and the support team tried to help me but they didn't give me a solution.

My problem happened some times and not always, when some one try to post a new thread he get a blank page with http 500 error !! the same happened when trying to edit some thread titles, and in both cases I can pass the error with change the title of the thread.

So I think there is something wrong with thread titles in my database, because I upgraded alot of times (so no files problem for sure) and changed my host many times.

Any help???