Database error in vBulletin 3.8.4:

Invalid SQL:

		SELECT 
			IF(votenum >= 1, votenum, 0) AS votenum,
			IF(votenum >= 1 AND votenum > 0, votetotal / votenum, 0) AS voteavg,
		 post.pagetext AS preview,
			thread.threadid, thread.title AS threadtitle, thread.forumid, pollid, open, postusername, postuserid, thread.iconid AS threadiconid,
			thread.dateline, notes, thread.visible, sticky, votetotal, thread.attach, thread.lastpost, thread.lastposter, thread.lastpostid, thread.replycount, IF(thread.views<=thread.replycount, thread.replycount+1, thread.views) AS views,
			thread.prefixid, thread.taglist, hiddencount, deletedcount
			
			, deletionlog.userid AS del_userid, deletionlog.username AS del_username, deletionlog.reason AS del_reason
			
			, threadredirect.expires
			
		FROM thread AS thread
			LEFT JOIN deletionlog AS deletionlog ON(thread.threadid = deletionlog.primaryid AND deletionlog.type = 'thread')
			
			
			LEFT JOIN post AS post ON(post.postid = thread.firstpostid)
			
			LEFT JOIN threadredirect AS threadredirect ON(thread.open = 10 AND thread.threadid = threadredirect.threadid)
			
		WHERE thread.threadid IN (0,307769,307740,307742,296582,294559,294809,294736,294709,294668,294616,294526,294504,289164,289152,283726,288197,288195,288194,288192,288191,265772,249137) 
		ORDER BY sticky DESC, lastpost DESC;

MySQL Error   : Table './****/post' is marked as crashed and should be repaired
Error Number  : 145
Request Date  : Tuesday, November 3rd 2009 @ 11:56:43 PM
Error Date    : Tuesday, November 3rd 2009 @ 11:56:43 PM
Script        : http://www.siteadi.com/forumdisplay.php/program-download-30.html
Referrer      : http://www.siteadı.com/
IP Address    : 
Username      : 
Classname     : 
MySQL Version : 5.0.77