When I first got the Revue, the controller worked perfectly with my SCIENTIFIC ATLANTA EXPLORER 4250HDC. But after a couple days, my channel bookmarks started to enter the channel numbers very slowly, to the point where the cable box would change after one digit was entered. Selecting a bookmark would even skip the first number of a channel. The cable box related buttons have become almost completely unresponsive. To get the cable box to react, I'd have to hold down any of the buttons for 1 to 3 seconds for the cable box to acknowledge the button press. This makes it impossible to go to specific channels. I reconfigured the Revue to the cable box twice already to the same result. I've unplugged the Revue for a couple hours and nothing changed. I don't know what else to do. Do I have a defective product or is it a software issue?