Maybe the newest versions of MinePeon are somehow incompatible with bfgminer.
I will check into this when I get home, it would be a bit of a bummer if it is true. The only reason I have been able to support both bfgminer and cgminer is because the API is the same and if they start to differ there is going to be problems.
Neil
I am using bfgminer with 0.2.3 MinePeon, but you have to make a modification to /usr/lib/systemd/system/bfgminer.service:
Instead of "-S auto", just change it to "-S all --icarus-options 115200:1:1 --icarus-timing 3.0=100"