Comment 21 for bug 194573

I also have this problem. Mostly I have Rhythmbox running (or at least it's started but doesn't play). Today it also happened with Audacious player. I can't reproduce it with the steps provided above. It also doesn't happen every time I receive a new email, but pretty often (maybe at least once a day, sometimes more often, maybe depending on email traffic).

I also suggest to change the title of the bug into a more meaningful title:
"Thunderbird freezes when playing notification sound for new email"