[o0Hubba0o]

All I did was in the forumhome_vbshout, in this part here...

    <div id="vbshout" style="overflow:auto;height:{$vboptions['shout_box_height']}px;width:88%;float:left;">
      Loading...
    </div>

    <div id="vbshoutwol" class="alt2" style="overflow:auto;height:{$vboptions['shout_box_height']}px;width:12%;float:left;">
      <div id="vbshoutwolhd" class="tcat">Shouting:</div>
      <div id="vbshoutwolusers">
        Loading...
      </div>
    </div>
    <div style="clear:both;"><img src="$vboptions[cleargifurl]" border="0" hight="1" width="1" /></div>

...I deleted the part in red, the: class="alt2". And it's working like a charm in IE and FF.