I've had it happen on MySpace (all of their flash advertisements I think are the culprit), YouTube when I feel like watching a few videos (again flash based). Those are the only two that I really visit that are flash websites. I rarely have flash enabled on any other sites these days. Just something I got used to from it happening repeatedly. I'll enable it again for random surfing and see if I can't find another one. Once it would happen though, if I killed all instances of Firefox I would once again be able to hear sounds without a problem.
-- playing audio in firefox locks sound card after close of audio window https://launchpad.net/bugs/71613 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs