Hello, I think the BW Mighty mouse is a great mouse, except, out of the 5 I've had, only one of them did not possess an odd defect (I had to return my iMac several times before getting a functional one, so with that experience, I've also used 5 BT mighty mice). Does anyone with the mouse notice the following - Put your hand on the mouse normally. Without "clicking", lower your index and middle finger (which should be on the left/right click sides of the mouse). Another way of doing this would be to "tap" the top shell of the MM (with two fingers, on opposite sides of the scroll ball), just like you would tap the touchpad of a laptop. The top outer shell of the mighty mouse depresses slightly, and it's very annoying. It even makes a sound when this happens. If you push any harder on the shell, it registers a click. I noticed that other Mice (logitech, etc) do not do this. Also, if you press on the lower part of the top shell (just below the apple logo), the shell sort of caves in, and makes a sound. These two problems are very hard to explain, but they have been present on 4/5 of the mighty mice I've experienced. Or maybe I'm just crazy. Does anyone notice this strange defect?