I've been having this issue too of the radio not responding to the power (off) button and so I cannot turn the radio off. It also does not respond to voice commands to turn off. I seem to only experience this problem with the radio when my blue tooth connection with my phone acts up or disconnects (which is almost every call now). All other functions are working fine for now.
Anyone else having issues with maintaining a bluetooth connection with their phone? My phone displays a message that the bluetooth signal is weak and then I lose the connection. I've repeatedly repaired the phone connection but it hasn't made any difference. I've never had any problems in the past with my phone connecting to other various bluetooth devices.
Had exactly the same problem last night.
I got in the car, iPhone 4S turned on with the BT turned on. Backed out of the garage, remembered I had left something in the house. Put the Explorer in park, ran in the house with the phone in my pocket (probably still in BT range) came back out, backed up again, camera switched on, put it in drive, headed down the drive. Camera switched off, no music. No volume control would adjust it.
I hit the main entertainment power button multiple times, no effect.
I noticed the lower left quadrant had a power button showing, touched the screen. No effect.
Then, I noticed the phone in the upper left quadrant had counted up to about 3 minutes, which is the time from when I first started the car. I tried tapping the upper left bar, but couldn't get a response out of the screen.
Then I shut off the BT on my phone and the call dropped and the radio came immediately on, though on FM, and not Sirius as I had left the vehicle (and it usually does not change sources, except after a MFT malfunction).
Thanks Ford. You told us you had the upgrade testing covered. Didn't need any real world beta testing. Your employees could handle it. Well BS!!!!! You should have let us help you. It was a very self serving offer. All we want is software that works!!!!!