New Post Error

[JD210]

On both the vbadvanced portal, and on the welcome panel, where it lists the link for New Posts, I get the following error whenever I click on the link to show new posts. This doesn't happen if there are no new posts, but if there are new posts, then the below error shows up. Any ideas as to how to fix this. The link to my boards is: Vast Frontier

Database error in vBulletin 3.0.3:

Invalid SQL:
SELECT post.pagetext AS preview,
thread.threadid, thread.threadid AS postid, thread.title AS threadtitle, thread.iconid AS threadiconid,
thread.replycount, IF(thread.views=0, thread.replycount+1, thread.views) as views, thread.sticky,
thread.pollid, thread.open, thread.lastpost AS postdateline,
thread.lastpost, thread.lastposter, thread.attach, thread.postusername, thread.forumid, thread.threaddesc
user.userid AS postuserid
, NOT ISNULL(subscribethread.subscribethreadid) AS issubscribed
FROM vb3thread AS thread
LEFT JOIN vb3user AS user ON(user.userid = thread.postuserid)
LEFT JOIN vb3subscribethread AS subscribethread
ON(subscribethread.threadid = thread.threadid AND subscribethread.userid = 1)
LEFT JOIN vb3post AS post ON(post.postid = thread.firstpostid)
WHERE thread.threadid IN
(19, 18)
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 '.userid AS postuserid
, NOT ISNULL(subscribethread.subscrib

mysql error number: 1064