This is an interesting utility now offered in IE10, the Compat Inspector.
Microsoft identifies it as:
“[A utility] to quickly identify if Internet Explorer platform changes affect your site. Whether you’re preparing for IE10 or still updating for IE9, run Compat Inspector on any page experiencing problems. Then watch for messages explaining potential issues and steps you can take to resolve them.
I don’t think this will be directly applicable to me, but it might be interesting to see some of the output it produces for curiosity’s sake.