I just found this ASP.Net server control horizontal scroll not working when align=right attribute is used! I digged into the HTML generated code and found something like this:
<div align="right" style="overflow:scroll; width: 200px; height:200px;">
<div style="width:400px; height:400px">
</div>
</div>
The horizontal scrollbar appears the moment you remove the align="right" attribute. Tested in Chrome 17/18. It works fine in Firefox 10 and IE 10
<script src="http://code.jquery.com/jquery-1.7.1.min.js" type="text/javascript"L></script>
<script type="text/javascript">
$('[align="right"]').css('float', 'right').removeAttr('align');
</script>