[other] Flash playback is choppy.

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http://ubuntuforums.org – Flash plays just fine when it is embedded to browser, but when it goes full screen it is choppy and uses the CPU to 100%. I used ubuntu minimal cd to install. I am using LXDE and firefox. Ive read somewhere that it may just be flash player 10, so should I downgrade to flash player 9? Or should I use one of the other flash players? (Hardware)