For the first round, see here. Their service (handled in the US!) was very good, and my earlier apprehension was unfounded (as many of the commenters predicted).
I got the unit back roughly 8 days after first sending it in, and they had had to replace it, at no charge to me. It got here Monday morning, and I rode with it Monday and Tuesday (it’s now Wednesday AM). Just now I decided to charge it more using the USB cable that transmits the data to the computer (and makes very pretty and informative graphs). The USB is not coming out of a hub, just computer to device.
‘Bzzzt’ said the USB connector while plugging in, and viola! Another bricked Forerunner 301. It’s a really neat gadget, and the heart rate monitor is first rate, but this is going to get expensive if it continues. I suspect the little cable connector is powering across something it shouldn’t in the plug-in sequence, though I’m not forcing anything, and it fits well once plugged in.
So, another request for an RMA is off. I like it, but wonder if anyone else is having these issues.