CSSSelector::parsePseudoElementType should use startsWithIgnoringASCIICase or some such. Example: http://software.hixie.ch/utilities/js/live-dom-viewer/?%3Cstyle%3E%0A%3A%3A-WEBKIT-blah%2C%20body%20%7B%20background%3Alime%20%7D%0A%3C%2Fstyle%3E
<rdar://problem/118081134>
*** This bug has been marked as a duplicate of bug 266759 ***