I had this before on older images, and have just had it again...
Basically, hilts changing channel, the picture will remain frozen on the previous channel, even though the audio is from the newly selected channel. I haven't tried to reboot the machine from the menu yet (as the box was in the middle of recording something and i didn't want to lose that, and also don't want to risk locking up the HDD again which would mean a green screen), but I'll try and do that later...
Basically, hilts changing channel, the picture will remain frozen on the previous channel, even though the audio is from the newly selected channel. I haven't tried to reboot the machine from the menu yet (as the box was in the middle of recording something and i didn't want to lose that, and also don't want to risk locking up the HDD again which would mean a green screen), but I'll try and do that later...