whats is this???

[Rickie3]

i keep getting this error sent to my email,concerning one of my members,could someone explain what this is please
Database error in vBulletin 3.5.0:

Invalid SQL:
;

MySQL Error : Query was empty
Error Number : 1065
Date : Wednesday, March 1st 2006 @ 06:35:35 PM
Script : http://www.sats-general.com/forum/
Referrer :
IP Address : xx.xxx.xx.xx
Username : Xxian.com
Classname : vB_Database

[Marco van Herwaarden]

Probably caused by a modification that is trying to run a query, but is not supplying the query. Impossible to tell what is causing it.

[Rickie3]

yes its got me stumped as this is the only member i am getting this error from,and the member not said anything about recieving page errors,i'm waiting for a PM from him to see what he has been accessing on my board,to see if i can pin point it,thanx for taking the time to reply

ok i found what was causing my error it was this hack https://vborg.vbsupport.ru/showthread.php?t=103996
a couple of my members were using netscape for there browser,and for some unknown reason this hack was failing to recognise that browser