Sreenshot of the new controls, please?There's a new QuickTime plugin with updated white on black controls.
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I'm concerned about the loss of some functions, though. In the "old" plugin, one could do frame-by-frame with arrow keys or the scroll wheel. With the white-on-black interface introduced in Snow Leopard (which isn't actually the Quicktime plugin), no longer. And there's no way to save the movie on disk even with QT Pro installed.
Regarding Flash performance, Snow Leopard introduced some improvements in Core Animation that also helped performance. Don't know if Lion improved this further. I also doubt that ATI/AMD GPUs are supported for H.264 decoding. We would have heard of it I believe.