How to stop hotlinking to a vBulletin shown image?

[Tim Skellett]

Hi,
while hotlinking is disabled on my site, it seems that outside sites can still hotlink to images shown by the vBulletin, such as in the below example (an avatar):

http://www....../image.php?u=2&dateline=1146....

How can I stop hotlinking to such images too?

Many thanks in advance for all help.

[Dismounted]

You will need to edit the .htaccess file, to also block "image.php".