DB error with 3.5.2

[ogden2k]

I have a custom hack that is an inline chatbox. After upgrading to the latest vB, guests get this error on the forum home:

<!--
Database error in vBulletin 3.5.2:
Invalid SQL:
SELECT userid, id, name, comment, date FROM chatbox
LEFT JOIN user ON (user.username=chatbox.name)
WHERE etat = 0 ORDER BY id DESC LIMIT;
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 3
Error Number : 1064
Date		 : Sunday, December 11th 2005 @ 01:51:44 PM
Script	 : http://www.thegrimescene.com/forums/
Referrer	 : http://www.thegrimescene.com/
IP Address : 68.171.28.68
Username	 : Unregistered
Classname	: vb_database
-->

Guests are not even allowed to see the CB or even call the CB. I have uninstalled and re-installed with now luck. This same hack works fine on another one of my boards, same vB and chat version.