[kh99]

I think it's the table row that starts like this:

<tr valign="top">
	<td class="alt2" width="175" style="border: $stylevar[cellspacing]px solid $stylevar[tborder_bgcolor]; border-top: 0px; border-bottom: 0px">

			<div id="postmenu_$post[postid]">
				<if condition="$show['profile']">
				<a class="bigusername" href="member.php?$session[sessionurl]u=$post[userid]">$post[musername]</a>
				<script type="text/javascript"> vbmenu_register("postmenu_$post[postid]", true); </script>
				<else />
				$post[musername]
				</if>
			</div>

but I'm not an HTML expert, I don't know why the width=175 doesn't limit it (I guess that's why you're asking so I should let someone who knows answer).