Seems like the problem is not only with flash. I noticed this problem with flash videos (including online radios that only display the disk cover), mplayer, totem, xine and with voip like skype. There are people having problems with all kinds of environments and drivers: http://ubuntuforums.org/showthread.php?t=1146319. I think this is not a problem with flash itself, but something higher, like pulseaudio or X.
Seems like the problem is not only with flash. I noticed this problem with flash videos (including online radios that only display the disk cover), mplayer, totem, xine and with voip like skype. There are people having problems with all kinds of environments and drivers: http:// ubuntuforums. org/showthread. php?t=1146319. I think this is not a problem with flash itself, but something higher, like pulseaudio or X.