I have a TivoHD over OTA with a strange issue. It seems that often times when I turn the TV on in the morning, I find that it is frozen from the last time it was turned off. Just that single channel is frozen -- if I change the channel, the other channels work, but that original channel remains frozen. From putzing around, I found that if I go into the signal strength screen, it will clear it out and fix that channel. Any ideas as to what is happening or how I can fix this strange phenomenon?