Forum DB Error When Editing a Post
 

I get a "Database Error" whenever I try to edit any post on my site, whether it is in the forums or a CMS article. It does not happen in the Blog area. I try to edit and when I save the edit, I get a popup that says "Database Error". Then I get an error message that says the following:

Invalid SQL: INSERT INTO vb_searchcore_text (searchcoreid, keywordtext) VALUES ( 75, ' I\'m loving this and the new stuff... I think we should consider the possibility of setting this straight to IPhone app status. I think we could get it written for under $1k' ) ON DUPLICATE KEY UPDATE searchcoreid = VALUES(searchcoreid), keywordtext = VALUES(keywordtext);
MySQL Error : Table './{DB Name}/vb_searchcore_text' is marked as crashed and should be repaired
Error Number : 145
Request Date : Friday, May 21st 2010 @ 12:19:11 PM

Obviously, the "VALUE" part of the error changes depending on which message I am editing.
I do not even have a table named "vb_searchcore_text". In fact, I do not use the prefix "vb_" at all in the database.
I checked the DB and it is fine. I ran a repair on all the tables as well as an optimize. There are no problems.

I just noticed this happening today. it was not happening in 4.01, so it must be a 4.02 and above issue. I am not running 4.03 PL1.

Ideas?