Comment: Under the new Conformance level definitions, I strongly suggest that 1.4.1 & 1.4.2 should be Level 1 and that 1.4.3 & 1.4.4 should be Level 2
reconsider the Levels the SC fall under - move them up a level
The description of conformance levels in WCAG 2 has been rewritten to clarify the levels (see http://www.w3.org/TR/2007/WD-WCAG20-20070517/#overview-levels ).
Because background audio can interfere with assistive technology, SC 1.4.1 (formerly 1.4.2) has been moved to level A.
Because level A attempts to put the fewest possible limitations on presentation, and because assistive technology will be able to present the text or text equivalents of this content to the user, the working group felt that SC 1.4.2 (formerly 1.4.1) was most appropriate at level AA.
Because of the additional limitations they put on presentation, the working group felt that SC 1.4.4 (formerly 1.4.3) and SC 1.4.5 (formerly 1.4.4) are most appropriate at level AAA.