Created attachment 51003 [details] Testcase This test fails: http://samples.msdn.microsoft.com/ietestcenter/css3/selectors/unaryPrefix.htm
Created attachment 51441 [details] Patch
Comment on attachment 51441 [details] Patch r=me
Fixed in r56405.
A test would have been nice =o. Could have even used msdn's? But this was a trivial change.