I think the specific issue we addressed before was how IE didn't obey the width CSS property that was set on CODE windows. That caused the rest of the page to become deformed as a result. I problem was made less severe, but was never completely fixed (because of IE's non-compliance).
I now prefer Opera over IE. I particularly like the wand feature. IE has something similar (autocomplete) but it's not quite as useful as 'wand'.