Joint Rotation Problem

Odd thing happened Yesterday,
I was working on a pose based on an old Glamour Photo, and the Right Forearm (elbow) stopped working right.
For some reason it would not bend; instead both the Bend and Twist Sliders twist the joint?
If I load another pose the problem goes away, but when I return to my preset, it returns as well.
The pose is not at all extreme, ... the joint is bent to about the mid point of its range.
Anyone else have this happen before.
Comments
Which figure is this? V4, Genesis? It sounds as if you might have another Pose Control working against it. Check the Currently Used Parameters list and see what other settings might be affecting it.
Thanks Cay, I'll look into that later, off to work presently.
Its a V4 based figure if that helps. BB.