Hi geep

Yes, I opened the "Graph" window and found that some of the parameters for the arm, shoulder and hand had *SplineSection * settings on them so I switched them to  Constant Section, which greatly reduced the movement, but didn't eliminate it completely it.  I have checked all the other parameters and can't see anything else to change.

As a test I even selected all the key frames for the character and deleted them, but the slight arm/hand movement continued!!