According to the IE Blog, IE8 officially passes the Acid2 tests now. You can see it in action over on Channel9 and hear more about IE8 in an interview with the IE team.
IE8 DOES NOT PASS THE ACID2 TEST.You heard me right. Microsoft, again, is using smoke and mirrors to give you this illusion. Their own press release says they “render” the smiley face but guess what? If you took that exact same version of browser and went to the actual online Acid2 test, it would fail just as bad as IE7 does. Why? How? They doctored the test page. They didn’t use the actual test. I’m sure the news will get around soon enough and some blogs are talking about it now.