Also is claiming it will support HTML5 and CSS3, but I'll believe it when I see it. Still does terrible on ACID3 which isn't much of a surprise.
Apparently they weren't planning on supporting XHTML fully initially, from what I heard. Sounds like they've changed that stance now though. Can't see them ever getting it anything like, personally. I'm guessing it'll end up the same as always. Looks alright from the users point of view but cocks everything up with a vengeance from the coding side of things.
Just sidetracking on the HTML5 point for a moment, am I the only one who seems to think that it appears like a half-hearted hack to try and make it something like 'cos they realised they'd dropped the ball?