They were never able to reproduce that particular problem. They've said they think that's fixed in the current internal build.

Specifically, we weren't able to reproduce what we suspect is a race condition during player startup whereby mute and pause got out of sync. What we've fixed, and this should solve Stig's problem too, is that once mute and pause were out of sync, they used to stay out of sync. Now, pausing and unpausing forces the mute to the correct state (rather than blindly toggling it).

Peter