I have logged a fault with garmin for my Edge 200, basically on the bottom, the one of the tabs has broken off which is used for the twist and secure mounting. Not to jazzed to be fair as I think they made a mistake putting the buttons on the side of this unit because all it has done is forced you to press hard on the side and thus force the unit up against its mount. Those with one of these may know what I mean. Anyway picture below of the damaged unit.
https://dl.dropbox.com/u/26242315/garmin.jpg
https://dl.dropbox.com/u/26242315/garmin.jpg