This guide is now obsolete as Adobe has finally released a 64 bit plugin
http://get.adobe.com/flashplayer/
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I have made a rpm for the new 64 bit plugin
It should work for F12 or higherCode:su yum erase flash-plugin nspluginwrapper* rpm -Uvh http://www.linux-ati-drivers.homecall.co.uk/flashplayer.x86_64/flash-release-1-2.noarch.rpm yum install flash-plugin