Forum DB error
 

I have been getting this error for over a month now:

Quote:
SELECT thread.threadid, thread.title, thread.lastpost, thread.forumid, thread.replycount, thread.postusername, thread.postuserid, thread.lastposter, thread.lastposterid, thread.dateline, thread.views, thread.visible, thread.open, user.usergroupid, user.displaygroupid
FROM vbthread AS thread
LEFT JOIN vbuser AS user ON (user.userid = thread.lastposterid)
WHERE NOT ISNULL(thread.threadid) AND thread.visible = '1' AND thread.open!='10' AND thread.forumid NOT IN(90,)
ORDER BY lastpost DESC
LIMIT 0, 15;

MySQL Error : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')
ORDER BY lastpost DESC
LIMIT 0, 15' at line 4
Error Number : 1064

I can't seem to find the cause. Any ideas?