I just installed version 2009.12.19 and I experienced the same here, The lastest version is an improvement but the problem still exist especially when I lock the screen. I cant easily recreate the problem, but it seem to be unable to recover sound once it is lost due to interruption. Is there a way I can start the app from the commandline so I can via more infor on the issue

@Sergey Vlasov - because the FM receiver and bluetooth transmitter/receiver are on the same chip inside the N900, and there's only one 'power cord' to it.