great thread I was playing with bones and came across some of thee bugs you mentioned thought it was just me. Especially the deformation of the mesh when you move an arm even with constraints. Question: I was going thru the tutorial on character animation and everything was fine except when I try to add my saved constraints from the right shoulder/ elbow / wrist of the left arm to the right arm. When I look at the motion transform section I see that that the constraints have been added but the arm will not move. Is this a bug or am I doing something wrong? John