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http://qa-dev.w3.org/~ville/wml-as-html.html is a valid WML 1.1 document, erratically sent as text/html. Validator says "not valid" but does not give any further clue what's wrong. Ideas how the output could be improved?
The referenced test case seems to have gone 404 on us. Besides, this is specific instance of the general problems of poor fallback handling and lack of warnings for inappropriate MIME types. Closing INVALID; reopen if I missed something on this specific case.
Duh, I'm sorry, dunno why I've removed the test case. Will maybe revisit in the future.