@Neil Stoker I can't answer your question, but you might get an answer quicker if you post your question independently and not as a reply to my post.

@Rongzhong Li Ok, thx. I actually wasn't sure if you had some sample already in there that would run if it detected the sensor was there, but I thought that if there wasn't any code specifically for it, that the sensor would simply be ignored. I didn't think it would have a detrimental effect. And I definitely didn't think that it could have a persistent effect even after being disconnected. That part really has me confused -- how it apparently corrupted or otherwise caused code to be rewritten. I need to go off & learn about I2C now it seems...

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?

@Rongzhong Li Thanks for the clarification -- I thought that must be true; I just didn't think there was room for any circuitry in that package.

Chris, you're not the only one -- I disconnected the battery and then started looking for the correct 2-pin connector that I was going to wire into my EBL Li-ion charger. Now I'm kind of wondering how a 5-volt charger charges a 7-volt battery...

I don't understand how the 1x4 header can go on the side opposite the servo pins, as well as the Pi 2x5 header -- if you mount it here, when you plug the wires into the 1x4 header it's too tall to then mount the Pi on this side of the Nyboard. What am I missing?