Hi
I have a problem that paste flipped doesn’t work properly. In quaternion coordinates of axes of plane reflection should be changed to negative values in order to paste flipped works OK. I suppose that I have to do bone roll somehow. However I don’t know what is correct way.
Here is my current situation of left and right calf bone:
http://postimg.org/image/hxzduo699/
http://postimg.org/image/lp8ygzjxp/
you should always recalculate bone roll angles ( ctrl N I think ) before parenting an armature