Recently i had problems with my flash player when going into youtube i could see the video but there was no audio. so for weeks i had been surching for a fix and found one that might help if anyone is have the same problem with flash playplayer on firefox 3.0. The problem was that libflashsupport was not instaled so on doing so i went into terminal and tyeped yum install libflashsupport it worked but to make shure it did i resarted the computer and it still worked.

This site was very helpfull in solving the problem

http://support.mozilla.com/tiki-view_forum_thread.php?locale=no&forumId=1&comments_parentId=106155