RZ, I posted this on Kickstarter in response to your latest email, as I thought you were soliciting comments there, but I suppose this is the more appropriate forum for this problem:
I have a lot going on myself right now, so I only get a few minutes a day to continue building my Nybble while I also try out my pre-assembled Bittle. One thing I found with Bittle is, he was functioning fine until I plugged in the first sensor -- the motion detector. With that plugged in and its LED glowing, no servos operate. And when I unplugged it, some of the behaviors are changed -- rest, greeting, and peeing are normal, but walking and running are about 4-10 times faster, and with pushups, the left front leg appears lame. So apparently, that motion sensor somehow corrupted some code. Ever seen anything like this happen, from just plugging in a sensor? Any ideas on what would cause this-- both the dead servos when sensor is connected, and the changed behaviors?