vBulletin database problem

I recently upgraded my vBulletin from 3.8 to 4.0.2 stable version, but since last 2 days my forum is giving strange database errors every few minutes.

The source is:

Database error in vBulletin 4.0.2:

Invalid SQL:

			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 vb_thread AS thread
			LEFT JOIN vb_user 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(52,23,)
			ORDER BY lastpost DESC
			LIMIT 0, 10;

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, 10' at line 4

Code (markup):

Could anyone please guide me fix this error?
Thanks in advance

 

ITS A DATA BASE ERROR once u reinstall the database sql and see ?
____________________________________________________
Raw foods | super foods

 

Thanks Shawn, actually i don't know which page is yielding the error.
When i log on to the homepage, its giving this error sometimes.

How do i rectify this?

 

Yeah, i have few additional mods installed on the forum. Will disable them and check for few hours.