It is funny, as I am now working on improving some small chameleon glitches, I have noticed that M$ does not follow own rules quite often.
Staring example are scrollbars in Internet Explorer - they look about the same, but do not follow Windows Explorer Scrollbars highlighting... Actually, scrollbar buttons are not highlighted at all.
Well, at this point, I would say any arguments about Chameleon not following Win7 exactly are somewhat moot... If Internet Explorer is considered good enough, we are too (minus these small glitches I am fixing now..)