[shoebappa]

Pretty cool tester, I think #2 isn't correct, at least in Chrome and Firefox, the third article doesn't match: http://jsfiddle.net/Ldgdh/

[ahmicro]

Yes I think too #2 It's working here http://jsbin.com/epexom/1/ did you passed it, or I am doing some thing wrong

[Chris_Newton]

The browsers are correct:

http://www.w3.org/TR/CSS2/selector.html#matching-attrs