Anyone got a clue why this is happening? I buy 25+ RUMBAs at a time for my kits and I'm getting waaaay too many customer support questions about this issue. I see in the threads here it's the same thing for individual buyers. Most of my customers are not savvy enough to attempt a firmware upgrade. I need a fix that will work forever or I need to switch to another board. This is sad because some of my robots NEED six stepper motors. Reprapdiscount, what do you say?