Every couple days my R10 is locking up and you can only see the guide and view recorded shows, no regular programming. Once you reboot, it works fine for awhile. Last night I also lost all my channels below 100, resulting in all my shows that were to record under 100 not to be recorded. Once rebooted, it was back to normal. I do not have it connected to a land line, could this be causing a problem? I use a Vonage adapter and I am having problems making the requested call every few weeks, hasn't worked in over 3 months. Are these known issues with this model or should I just take it back to Circuit City and exchange.