Thanks for the fast replies.
I bought my R-Box from Canary along with the power supply, so I assume it is adequate.
IF the cause is an unstable pool, I am wondering why that problem doesn't happen to my Antminer U2's? I should have been more specific, that there are 3 devices (R-Box and 2 U2's) but the only one that dies is the R-box.
It was a driver-specific bug when it is starved for work (which happens when the pools are unstable).
My R-Box would die at times (usually when I was farthest away from it!), but I got Multiminer (
https://bitcointalk.org/index.php?topic=248173.0) and it's been running great since (I haven't checked the logs to see if it needed to be restarted at all, though). Multiminer runs on top of bfgminer and monitors it's performance and behavior. There are even apps for your phone to allow you to monitor and even restart the miners if you need to. I'm also running 10 U1/U2s and they are behaving themselves better as well. I'm currently mining UNO on miningpool.co