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Test Case: ul {list-style-type: none;} Result: Value Error : list-style-type none is not a list-style-type value : none
This only happens when testing against CSS level 3. A related bug is that although the declaration list-style: none passes, it is (in CSS3 mode) incorrectly echoed in the “Valid CSS information” part as list-style-position : none none;
The problem is more serious than originally observed. Even list-style-type: disc is reported as an error in CSS 2.1. Moreover, e.g. list-style: decimal passes, but then “Valid CSS information” contains list-style-position : decimal;
All fixed now, the duplicate none is present only on prod servers, they will be upgraded soon (but should be ok on http://qa-dev.w3.org:8001/css-validator/ ) Thanks,