And you already tried to modify it to:
Code:
<if condition="$show['avatar']"><td class="alt2"><a href="member.php?$session[sessionurl]u=$post[userid]" style="text-decoration: none;"><img src="$post[avatarurl]" $post[avwidth] $post[avheight] alt="<phrase 1="$post[username]">$vbphrase[xs_avatar]</phrase>" border="0" /></a></td></if>
And you modified it in the correct template (I'm not sure if you are using the postbit or postbit_legacy template on your site)?