My Radio/Music switching is working perfectly. I have noticed two small issues though.
1) If you change from music to radio while playing in random mode, 'random' is still shown in the title bar even though the radio is now playing.
2) Mute doesn't appear to work when playing radio - this may be a setting I have not enabled?
I also have a suggestion:
1) Display a button or image that covers the entire screen once the monitor has been turned off by pressing and holding the dim button for 2 seconds. Currently, when the monitor is off and you touch the screen to turn it back on, you are bound to hit a button. By adding an image or button that is the size of the entire scren, (which you won't be able to see anyway becuase the monitor is off) it will allow the user to tap the screen to turn it back on without accidentally hitting button.