flash and firefox again

[Amadeus W.M.]

Man, is flash broken (again?) or what? It was working before the upgrade 
to flash-10, but now cnn videos are very choppy when they play, or simply 
don't play at all. Do other people have this problem? I have a 
hyperthreaded 2.8GHz processor and cnn video takes some 70% on each 
thread. Prior to the update I would see some 30-40% (as far as I can 
recall), and only on one of the threads, not both. 

Video on other sites plays well though, e.g. uefa.com.