Visibility: collapse is ignored on elements other than tables. This is incorrect since it should be treated as hidden - see the quote from the specified URL: collapse Please consult the section on dynamic row and column effects in tables. If used on elements other than rows or columns, 'collapse' has the same meaning as 'hidden'.

Marking INVALID becaus there's no test case. In general we do treat 'collapse' like 'hidden' and have for quite a while. If you don't think it's working with the _latest_ build, then please submit specific test cases

Verifying INVALID. There is another bug currently filed which _does_ have plenty of test cases.