Tested with trunk - Version 5.0 (6533.16, r61783) The test at http://disruptive-innovations.com/zoo/csswg/specificity-test.html should show a green background and not a red one. Too high specificity for :not() ?
Created attachment 78324 [details] Patch. Give negated selectors the specificity of the selector they are negating.
(In reply to comment #1) > Created an attachment (id=78324) [details] > Patch. > > Give negated selectors the specificity of the selector they are negating. Based on http://www.w3.org/TR/css3-selectors/#specificity.
Committed 75369. <http://trac.webkit.org/changeset/75369>.