After upgrade to firmware 1.9, I seem to have a problem with the sound.
When I listen to the radio, from time to time, the sound goes off. After some seconds, the sound comes back. It's as during those seconds the soundsettings are locked. Whe I turn the knob to adjust the sound, nothing happens. You even do not see the litte box in the upper right corner with the current volume setting. And then suddenly the sound comes back.