Is my site hacked?
 

I did recive this error message via mail:

Code:
Database error in vBulletin 3.8.3:

Invalid SQL:
SHOW COLUMNS FROM user LIKE 'username';

MySQL Error : Got error 28 from storage engine
Error Number : 1030
Request Date : Sunday, August 16th 2009 @ 10:48:31 PM
Error Date : Sunday, August 16th 2009 @ 10:48:35 PM
Script : Removed by me

Referrer : Removed by me

IP Address : 194.8.75.13
Username : MozeKlosedq
Classname : vB_Database
MySQL Version :
What is this? Anyone?