Does vBulletin cache avatars from external links instead of just putting the path in the <img> tag? i.e., if I make my avatar http://www.liquid2k.com/filburt1/avatars/avatar15.gif, will the board download it and use it, or just put <img src="http://www.liquid2k.com/filburt1/avatars/avatar15.gif"> in the HTML?