I have the white 32gb iPhone 3G(S). When the phone's ringer switch is on mute (when the red dot is exposed) and I tap on it, the switch wiggles a lot like its going to fall off. But when it's pushed back up so that there's sound again and I tap on the switch, its sturdy with no problems. Anyone else experiencing the same, or is this common with all 3G(S) iphones? Thanks.