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This doesn't use Canvas, only CSS. And there is only 1 line of JavaScript code, to delay the playing of the music.

Not a big deal, but it also fails on IE 7.

You are right. This is done with webkit-specific animations, transitions, and 3D transforms, which Apple has proposed as modules for CSS3. As all of these modules have yet to reach the status of recommendations, I think that the title of this post is a bit deceiving. For now I have to call this a proprietary webkit demo.

Crashing FF seems fairly unacceptable, you'd think it would just render it incorrectly.

It crashes FF 3.5.5 on Snow Leopard too. Someone is going to have fun with it.