database error help needed please!!

[Rickie3]

Hi my host has just upgraded to Mysql5.0.21-standard and PHP5.1.4

and now i'm getting a database error, clicking the userCP in the navbar
the error returned is as follows

Database error in vBulletin 3.5.0:

Invalid SQL:

		SELECT thread.threadid, thread.forumid,
			IF(threadread.readtime IS NULL, 1147835566, IF(threadread.readtime < 1147835566, 1147835566, threadread.readtime)) AS threadread,
			IF(forumread.readtime IS NULL, 1147835566, IF(forumread.readtime < 1147835566, 1147835566, forumread.readtime)) AS forumread,
			thread.lastpost, subscribethread.subscribethreadid
		FROM sg_thread AS thread,
			sg_subscribethread AS subscribethread
		LEFT JOIN sg_threadread AS threadread ON (threadread.threadid = thread.threadid AND threadread.userid = 1)
		LEFT JOIN sg_forumread AS forumread ON (forumread.forumid = thread.forumid AND forumread.userid = 1)
		WHERE subscribethread.threadid = thread.threadid
			AND subscribethread.userid = 1
			AND thread.visible = 1
		HAVING thread.lastpost > IF(threadread > forumread, threadread, forumread);

MySQL Error  : Unknown column 'thread.threadid' in 'on clause'
Error Number : 1054
Date         : Saturday, July 15th 2006 @ 11:12:46 PM
Script       : http://www.sats-general.com/forum/usercp.php
Referrer     : http://www.sats-general.com/forum/index.php?
IP Address   : xxxxxxxxxxxxxxx
Username     : Rickie3
Classname    : vB_Database

I contacted my host but they say its a vbulletin problem,but i didnt have issuues until the upgraded.Any help appreciated