FIX: SharePoint 2010 Ribbon and IE10 - Screen goes white.

<!-- Fix for ie10 bug where SharePoint Ribbon dropdown causes screen to go white -->
<style type="text/css">
.ms-cui-modalDiv-ie,.ms-cui-glass-ie
{
background-color:transparent !important;
}
</style>


Reference: http://davemcmahon81.wordpress.com/2012/12/11/sharepoint-2010-ribbon-and-ie10-screen-goes-white/