Flash ads / apps in Firefox flickering and render artifacts

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http://www.linuxquestions.org – For the past month or so my flash has been acting up. It seems to work fine if the entire flash element is on screen (though I think this might not even work anymore). Otherwise everything looks scrambled basically. Has anyone else ran into this? I have an intel graphics card, firefox 22, xserver 1.12, xorg intel driver 2.19, flash 11.2.202 (HowTos)