Interesting to hear of others that have had lockups due to signal loss. I haven't gotten any with my HR20-100 yet, but I've only had it a week. I have, though, had lockups with signal loss on my DirecTivo (HDVR2) over the past month or 2. Never had for years before that, though. If I recall, there may have been a software update that precipitated the start of the lockups.