[Wnerd]

I keep getting this error:

Database error in vBulletin 3.0.3:

Invalid SQL: 
		SELECT user.avatarid, user.avatarrevision, avatarpath, NOT ISNULL(avatardata) AS hascustom, customavatar.dateline
		FROM user AS user
		LEFT JOIN avatar AS avatar ON avatar.avatarid = user.avatarid
		LEFT JOIN customavatar AS customavatar ON customavatar.userid = user.userid
		WHERE user.userid = 
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 '' at line 5

mysql error number: 1064

Date: Sunday 24th of October 2004 04:31:37 PM
Script: http://psychoklown.com/forum/arcade.php?do=challenges
Referer: 
Username: RabidMonkey
IP Address: 67.*.*.254

I removed the 2 IP numbers so he doesnt get disturbed.

He's not the only User who gets the error. Anyone know why?