This sub-test examines the level of support for three RFCs, 2318 (CSS mime type), 2068 (HTTP 1.1), and 1521 (MIME), as well as compliance with Section 14.2.1 of the HTML4.0 specification. See also Test 66 of the ImportTest.
Test 68a works by setting the content type of a linked stylesheet
to "text/nonsense" using both a real HTTP header and the
type attribute on the LINK element. This
should cause UAs to ignore that stylesheet.
(68a). Linked stylesheet with Content-Type of "text/nonsense".
(68b). Linked stylesheet with Content-Type of "text/nonsense".
If either of the tests are red, then the browser is buggy (B). If the tests are unstyled, then the browser is a maybe (M). Browsers may be upgraded to full pass status (Y) if they pass test 66 and either I notice or someone tells me.