Cam Flickering This is A BUG ?

hi can someone help me remove this problem in this post http://forum.unity3d.com/threads/69485-Cam-flickering-(vibrate)-every-2-5-seconds i have attach many example ... this problem is in the cam , if cam cove or an object or simply change constantly offset of a material the cam flick .

private var speed : float = 1 ; private var offset : float = 0 ;

function Update() { offset += Time.deltaTime*speed ; renderer.material.mainTextureOffset = Vector2 (offset, 0); }