I installed Hardy RC and had the same problem (Youtube played without sound when Totem was running).
Installing libflashsupport from Synaptic fixed this problem in my case: http://ubuntuforums.org/showthread.php?t=708907&page=2 -- [hardy] flash plugin can't play videos at all then other program is using audio device https://bugs.launchpad.net/bugs/196470 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs