Looks like the Webkit team have proved they are the leading player in standards compliance as today they have released a public build that passes the Acid 3 test.
It can be downloaded here: http://nightly.webkit.org/
I wonder how long it will take for the other browser manufacturers to catch up? Considering that the Acid 3 test, tests for things that are not actually adopted standards, whether other browsers should want to pass the test at all?
http://webkit.org/blog/173/webkit-achieves-acid3-100100-in-public-build/