Rigging - Arms - 02

I found that when i rotated the legs on the Character, one foot was acting differently from the other, i managed to fix this by creating the IK handles in the right foot again, as it turns out i did not have Sticky keys on when creating the solver.

I now have a similar problem with the arms, so i am re-doing the left arm again as i believe the right arm was ok, and i cant quite pin point the part where i went wrong, but it could be down to the solver again.

Im quite enjoying it at the moment, but i think its going to be the paint skin weights that will be the problem in the end.