Attached Link: http://www.agvideo.tv/caustictest2.mov

Well I try another test. This time is an clear cristal shader sphere inside a box, with 2 lights. the problem is still there, less notorius when the camera move, but you could see the caustics aura shaking when the motion stop. Now I wonder if this is a normal behavior for the caustics. You could see the mov (681k) and the seting for the render, in my first seting I use photon count of 40000 and the filter size in 10, now I change to 65211 and 65.