Flash Player: Adobe or Alternative?

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http://www.linuxforums.org – I just successfully installed fedora 12. I noticed there is an oficial adobe flash player, and an alternative ones (nash and swfdec). Is the adobe one the recommended, as in most stable, no CPU utilization problems? Or should i go with one of the open source alternatives? Thanks! PS: i would be using mostly Firefox, with Chrome from time to time. (HowTos)