Give me a sec, will ya?

Have you used the insert key recently with components selected?

Pressing insert while you have CVs or what-have-you selected and you can move your pivot for that selection. You also should notice a small blue circle near your gizmo. If you click this, it will make the manipulator stay at the new location, otherwise, it'll reset each time.

The first thing I can think that must have happend is this circle was clicked while using the insert key with the rotate tool. Click that circle again and it should go back.

EDIT:

Well, hopefully this will help for next time.