The latest Dev channel release (6.0.447.0 dev) has our new HTML5
tokenizer enabled. This is the first half of our implementation of
the HTML5 parsing algorithm. Please be on the lookout for pages that
parse incorrectly. If you find such a page, please file a bug at
https://bugs.webkit.org/ and CC Eric Seidel, Tony Gentilcore, and me.
Happy parsing!
Adam