[wtallis]

Version checks on Mac OS X are not necessary: The system requirements for Flash 10.0 on OS X state that OS X 10.4 or later is required. Mac OS X 10.4 and later ship with QuickTime 7, which includes h.264 support. Quicktime 7 cannot be removed from the operating system. Thus, exactly everybody who can run the latest stable release of Flash for Mac already has an OS-provided h.264 decoder that has proven to be much more efficient than the one that is in Flash. Not using Quicktime on OS X is like not using DirectX 10 on Windows Vista and 7.

As to the current performance of the latest Flash beta, what is your justification for Flash requiring five times the computational resources of other video players? What is Flash doing that is not only more intensive than h.264 decoding, but four times more intensive?