Add this code to any web page (in vShare it's usually header.tpl and right before the </head> tag) to get IE7 / IE8 to behave like standard-compliant browsers:

Code:
<!--[if lt IE 8]>
<script src="http://ie7-js.googlecode.com/svn/version/2.0(beta3)/IE8.js" type="text/javascript"></script>
<![endif]-->
The java download and article found here: http://code.google.com/p/ie7-js/

You can either directly link to the .js file on google or download it and put it on your local server. The posted code will directly link to the file on Google so all you have to do is copy and paste the code and voila...your site will look the same in IE as it does in FF. ;)