I've had 2 RCN Tivo Premiere boxes for about a year now. Both have been flawless. Last weekend I noticed that I had lost 3 Showtime HD channels on both boxes. A few days later, both also lost Comedy Central HD. I get a message that says "Searching for signal on this cable channel." I have tried rebooting both boxes multiple times. I have checked the signal on the channels, which gives me varied information. Sometimes it will show no signal on either tuner. Sometimes it will show 90-93% on one tuner and nothing on the other. If I switch tuners and check again, I get the same signal info, only in reverse. Neither tuner will display the channels. Incidentally, I received the upgrade to 14.8 a few weeks ago. Could this be related? Any ideas or suggestions?