Sound loss, when going from SD to HD, changing channels will get the sound back most of the time.
Dark picture problem on S-Video, not all 811's. My first 811, I thought was having an issue with the DVI-Out, 2nd 811 still not working correctly on a JVC LT 26Wx84. Now I am exchanging the TV as it's not a setting, nor a cable. The 1st 811 had good PQ on S Video, replacement 811 is so dark you can't hardly see the picture, so I am keeping the original 811 and sending the replacement back.
After watching digital OTA station for couple of hours and try switching back, aquiring sat signal for 15-20 seconds before guide or picture returns and some times, locks up and you have to unplug the unit which can cause loss of modified remote channel.
Occaisional lockup when changing channels, requires hard reset.
Paid for channels, sometimes go to red, clicking on them, makes them come back.