First off; DON'T FREAK!!
Here's the deal; A lot of fuss was made (and rightly so) when an early beta of IE 8 correctly rendered the Acid2 test.
Almost immediately, though, the goalposts were moved by the release of the Acid3 test. These are the first published results of various browser/platforms' performance in the Acid3 test. These results are so far from definitive that it's silly. So take them for what they are worth, which is nearly nothing beyond the curiosity value.
Even so; they're interesting.