Why fingers bones don't bend properly? I'm new to animation and rigging in Blender, matter of fact new to blender. But I want to learn rigging and animation right now, and I've setup this rig:

And everything moving the large standing bone at the palm of the hand moves the entire arm properly. Yet when I try to curl/bend the fingers into a fist pose, here's the result:





Basicly I've setup the finger bones to copy rotation on Z axis from floating curl control bones. That's all. Any ideas?
It can be fixed by adjusting your weight paint. Try distributing the weight more accurately according to the vertices. It should fix your problem.