From The IEBl0g

In that vein, I’ve seen a lot of comments asking if we will pass the Acid2 browser test published by the Web Standards Project when IE7 ships. I’ll go ahead and relieve the suspense by saying we will not pass this test when IE7 ships. [...] We fully recognize that IE is behind the game today in CSS support.

There is also a list of layout and other issues that have finally been fixed. I’ve basically given up on hacking pages to make IE layout correctly as a special case… wouldn’t it be nice if they had a non-broken box model by now?