Shaking GameObject Problem

i have a problem with my gameObject again. So if i set my terrain resolution bigger than 2000 then i move the GameObject. My gameObject is shaking, But if i set terrain resolution below 1000. My gameObject is fine (nothing happen). Is that a bug? or something else?

Thanks

Your object may be colliding with itself if you haven’t configured it’s components properly.

See topic http://answers.unity3d.com/questions/7671/guidelines-for-using-rigidbody-collider-characterc.html