Issue: Error 1064

Database error in vBulletin 3.7.3:

Invalid SQL:

			SELECT
				post.*, post.username AS postusername, post.ipaddress AS ip, IF(post.visible = 2, 1, 0) AS isdeleted,
				user.*, userfield.*, usertextfield.*,
				
				avatar.avatarpath, NOT ISNULL(customavatar.userid) AS hascustomavatar, customavatar.dateline AS avatardateline,customavatar.width AS avwidth,customavatar.height AS avheight,
				
				editlog.userid AS edit_userid, editlog.username AS edit_username, editlog.dateline AS edit_dateline,
				editlog.reason AS edit_reason, editlog.hashistory,
				postparsed.pagetext_html, postparsed.hasimages,
				sigparsed.signatureparsed, sigparsed.hasimages AS sighasimages,
				sigpic.userid AS sigpic, sigpic.dateline AS sigpicdateline, sigpic.width AS sigpicwidth, sigpic.height AS sigpicheight,
				IF(displaygroupid=0, user.usergroupid, displaygroupid) AS displaygroupid, infractiongroupid
				
				
			FROM post AS post
			LEFT JOIN user AS user ON(user.userid = post.userid)
			LEFT JOIN userfield AS userfield ON(userfield.userid = user.userid)
			LEFT JOIN usertextfield AS usertextfield ON(usertextfield.userid = user.userid)
			
			LEFT JOIN avatar AS avatar ON(avatar.avatarid = user.avatarid) LEFT JOIN customavatar AS customavatar ON(customavatar.userid = user.userid)
				
			LEFT JOIN editlog AS editlog ON(editlog.postid = post.postid)
			LEFT JOIN postparsed AS postparsed ON(postparsed.postid = post.postid AND postparsed.styleid = 20 AND postparsed.languageid = 1)
			LEFT JOIN sigparsed AS sigparsed ON(sigparsed.userid = user.userid AND sigparsed.styleid = 20 AND sigparsed.languageid = 1)
			LEFT JOIN sigpic AS sigpic ON(sigpic.userid = post.userid)
			
			WHERE post.threadid =  AND post.dateline > 1220255262 AND (post.visible = 1 OR post.postid = 46652)
				
			ORDER BY dateline;

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 'AND post.dateline > 1220255262 AND (post.visible = 1 OR post.postid = 46652)
			' at line 27
Error Number  : 1064
Request Date  : Monday, September 1st 2008 @ 02:23:01 AM
Error Date    : Monday, September 1st 2008 @ 02:23:01 AM
Script        : hxxp://www.infinitiscene.com/forum/newreply.php?do=postreply&t=477
Referrer      : hxxp://www.infinitiscene.com/forum/showthread.php?p=46642
IP Address    : xxx.xxx.xxx.xxx
Username      : asherchy
Classname     : vB_Database
MySQL Version :