Originally Posted By: andy
Also, it appears that when that page was first published IE9 did not pass 100% of the test cases, I really do believe that that page is an honest effort from the IE test team to highlight parts of the standards that are ambiguous or tricky to get right.

They've just updated the page with some new unit tests and are back to IE9 not passing 100% of all the tests posted (though that said IE9 passes more than all the other browsers in all but one categories).
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