Ard -- problem number one is most likely "tuner lockup" which seems to happen from time to time.
I've had it happen twice, always there was no particular reason for it -- not taxing the system, no power outage, no strange issues predating the lockup.
So a problem with no warning that will cause 630s to not record when they should. I suspect tuner lockup will be one of the problems that haunt the 630 and annoy us all.
Hopefully this issue is on the list on things to address next firmware.
Problem #2 has been reported by others here a lot, so you're not alone. I haven't had this particular problem though. I've had a few, but far less than I did on the 530.
ATV3 / Unblock-US / Netflix / HuluPlus / Samsung LNT3242H