Go my HR20-100 and been using it like crazy for three weeks without a single problem. Sorry to hear about everyone elses. Are they the 700's or 100's you all are having probelms with?
I've had my HR20-700 for 10 months and have never had ...some... of the issues you guys are having.
If you channel changing is too slow for you, turn your "Native " selection to OFF.
I have never had the going backwards when pressing FF either.
Overall, mine has worked VERY well since I got it.
My buddy got his about a month or so ago and has had NO problems either
Jimbo