I have just started with the BrickPi and am running the simplebot_speed example. For the most part it seems to be working, but if I define DEBUG, I see quite a few BrickPiRx errors": -2 (timeout) and -5 (checksum). Is this something to be concerned about? There have been times when one of the motors turns off by itself, but that has not been very reproducible. Is there any work being done about making the communications with the BrickPi more robust?