1.) Turn off the radio buffer.
Bug: No radio audio (if radio was already playing, it will immediately stop).
I'm using the Infill G4 with an external USB soundcard, if it matters. Radio audio was not working at all in RC3. I have the playback/record radio settings both set to Realtek Line In (Realtek is the onboard sound card; my external USB soundcard is an Audio Advantage Roadie).
(This is for CF 2.0 RC4.)