You are an experienced programmer and have a problem with the engine, shaders, or advanced effects? Here you'll get answers. No questions about C++ programming or topics which are answered in the tutorials!
Thankfully it seemed I was wrong in thinking that the problem had to do with quaternions. If it really had I probably would not have fixed it. There may still be a problem with quaternion rotation, I'm not sure, but it doesn't seem to be related to the problem I fixed with getMatrixOfJoint (which allows my getXJointNode to work)
You do a lot of programming? Really? I try to get some in, but the debugging keeps me pretty busy.