I find it's not working in 3.7 beta 4..
Database error in vBulletin 3.7.0 Beta 4:
Invalid SQL:
SELECT dateline, userid FROM customavatar WHERE 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 1
Error Number : 1064
Date : Monday, February 4th 2008 @ 08:48:35 PM
Script :
http://www.bmww.org/forums/index.php
Referrer :
http://www.bmww.org/forums/admincp/index.php?do=head
MySQL Version : 4.1.20