Did something change with the pool around 8am EST? BFGMiner suddenly stopped working and I have had to switch to cgminer. I get no error, it just causes the app to lock up and become unkillable. It is listed as defunct in the ps listing after trying to kill or press ctrl+c.
Could you make a debug log of this?
bfgminer <your options here> --debuglog 2>debug.log
Luke, I ran bfgminer with the debug log yesterday morning and so far it has not frozen up.
If it happens again, I will send you log files. Aside from this problem, it has been noticeably more stable than cgminer and continues to use 5%+ less electricity.
I would normally blame problems with my hardware but this was happening on both of my rigs and all cards. Perhaps it was some kind of network related problems. During the issue my cable internet was working fine otherwise.