Problem with motion shape

I have some problems with the motion of shape, the border of the shape …SHAKE !! and more too !
Somebody can help me??? I have try to do something, like change the fps or change the shape in a MC but nothing !

There are 3 links for exmp :

motion shape:
[COLOR=#0000ff]http://www.dispotoepartners.it/test/forma.html[/COLOR]

motion of MC without cache bitmpa a runtine:
[COLOR=#0000ff]http://www.dispotoepartners.it/test/movimento1.html[/COLOR]

motion of MC with cache bitmpa a runtine:
[COLOR=#0000ff]http://www.dispotoepartners.it/test/movimento2.html[/COLOR]

All 3 moves have 200 frames in timeline, 4 keyframe, and between each keyframe there are 50 frames, fps 25.