WP-Supercache Issue

I am getting a huge gray box overlayed onto my site by what appears to be supercache. Only happens in FF3, not in IE. http://epic-cc.com/ev 2.7.1 for WP, and laster Supercache version. here is the code that is causing it.

<div style=”position: absolute; left: 0px; top: 0px; width: 100%; height: 1000px; background-color: rgb(238, 238, 238); opacity: 0.5; z-index: 100000; display: block;” id=”ga_shade”></div>

Any help?