Does anyone get a weird "dududududu" noise coming from their Wii after exiting to the main menu? This has happened to me twice so far, once after exiting the Mii channel, and once when turning the unit on, so it's very infrequent since I've had it for several weeks. It isn't scratching my discs, and the system works perfectly fine for hours on end. Just sounds a little too loud and wierd to be a normal sound. Is it just the laser mechanism going back to the home position?