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Test case checked using direct input mode, grammar CSS2 selected: Test cases : element { background-image: url(myimage\) ; } I believe that the above example is illegal, if my reading of CSS 2.1 and CSS 2 is correct, yet the validator reports no error. Reasoning: the escaped close-) should be treated as part of the contents of the url, and an additional closing-) is still required. See the production for "url" in CSS2 section D.2. Regards, Cecil Ward.
Re-tested 2007-10-24, this bug remains evident.
Fixed by upgrading the grammar used in the validator. live at http://qa-dev.w3.org:8001/css-validator/
Created attachment 536 [details] test case ... adding this to the test suite for regression testing