Hardware aacceleration is finally enabled by default on my Mid 2009 Macbook Pro 13" i beleive it's the 9400m card... So I am happy, memory usage seems a bit high, Flash crashes every now and again, but I am using a beta version of flash so that could have something to do with it. However, with hardware acceleration finally being enabled, CPU usage while streaming youtube videos in HD seems to be a substantial amount less than it is when using the latest 3.9 build. Overall, beta 9 is the best one I have tried to date. Keep up the good work, I am positive all the bugs will be sorted out by he final release...

Is it just me or was the hardware acceleration more effective in the gala previews than in this release? I am seeing a higher cpu usage when streaming HD videos on youtube in comparison to the cpu usage when watching HD using the gala previews 1&2... Just wondering if anyone else has noticed this? I kind of miss the little white square in the top corner because at least then you knew when hardware acceleration was being used and when it was not being utilized... On a more positive note, this release is far more stable than the gala previews were for me when using these firefox 4 beta's.

CPU usage during HD video streaming on youtube is almost cut in half when using this version. Runs great, only issue i can find is that there is a small white box in the top left corner of the video screen regardless of the video being played, or website it is being streamed from. If this box would go away this would probably be the best version of flash i have encountered to date...