Remove the p tag that you have wrapped the form with as that is invalid and is likely breaking IE and stopping the styles from being applied correctly.
[/B]<form name="ChronoContact_contact_us" id="ChronoContact_contact_us" method="post" action="http://rewebbed.net/wvg/index.php?option=com_chronocontact&task=send&chronoformname=contact_us&Itemid=6" >
... etc ...
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<div class="chronoform"> <a href="http://www.chronoengine.com">Powered By ChronoForms - ChronoEngine.com</a> </div>
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hmm doesn't look like you make code bold with the new vb4 as it has just added b tags.