In your postbit template find:
HTML Code:
<if condition="$show['avatar']"><td class="alt2"><a href="member.php?$session[sessionurl]u=$post[userid]"><img src="$avatarurl" alt="<phrase 1="$post[username]">$vbphrase[xs_avatar]</phrase>" border="0" /></a></td></if>
Replace with:
HTML Code:
<if condition="$show['avatar']"><td class="alt2"><a href="member.php?$session[sessionurl]u=$post[userid]"><img src="$avatarurl" alt="<phrase 1="$post[username]" width="xx" height="xx">$vbphrase[xs_avatar]</phrase>" border="0" /></a></td></if>
Replace xx with the new rule your enforcing. Hope this helps.