I suspect this kind of thing is a lot harder than it sounds. There are a few things you could catch, like CSS features that just don't exist in IE6, but trying

I suspect this kind of thing is a lot harder than it sounds. There are a few things you could catch, like CSS features that just don't exist in IE6, but trying to predict if your particular mix of content+HTML+CSS is going to "look wrong" when viewed in IE is not a trivial problem.