Ubuntu 10.04 64bit
I also know this to be present on Ubuntu 9.10 64bit
When playing Haven and Hearth in Linux, it prevents sounds from any other program from being played. Only Haven's sound is played.
There is a slight work around, if you have any sound using application on before launching haven, it will still work, but prevent Haven's sound from playing.
If at any point you stop using the other sound producing program, Haven will take over. At this time, it sounds like a burst of static, but it's just all the sounds that have been produced by haven playing at once. Like they have been queued. I'm not too familiar with the way Linux handles sound, but it sounds like the old days of OSS when only one application could produce sound at once.