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The following line in the header... <link rel="up" title="Opp ett nivå" href="../" /> ...produces the following error when trying to validate the CSS: Please, validate your XML document first! Line 13 [the link line above] Column 42 Element type "link" must be followed by either attribute specifications, ">" or "/>". The page validates as XHTML 1.0 Transitional, and the fix is just to replace the Norwegian "å" with å. Still, this should not be necessary.
This lies in the HTML validating part of the CSS validator
*** This bug has been marked as a duplicate of 294 ***