Haze effect with motion?

[still in school]

I recently just picked up a MBA rev A. I've noticed that with a dark background, with a sudden move of the pointer, a "faint, haze" copy of where the pointer used to be is still there and slowly disappears within a few seconds. The same thing happens when a menu from the top is dropped down and closed. Is this normal?

 

[Macjames]

I've never noticed anything like that!