Using bfgminer 3.4 on Xubuntu I got 2.3Gh/s with no errors.

Moved to bfgminer 3.4 on RedHat (RHEL6) and still get 2.3Gh/s but now see the ~60% error rate.

One interesting thing I noticed:
on Ubuntu I had to use "-S bitfury:/dev/ttyACM0" - but...
on RHEL I had to use "-S bigpic:/dev/ttyACM0"

Yet the Windows miner uses BF1: ...  why all the differences?