I'm beginning to think I have the only Nav III with this problem since no one at Garmin seems to have heard of it. My screen will switch from the map, to the "Save in Favorites" screen, or to the Calibration Screen, or to any one of the other screens on the system all by itself. It has been doing this since I bought the bike in 07. Oh, it's an '07 LT. I began calling Garmin when it started, about 6 months after I bought the bike, and was given all sorts of things to try, hard restart, reset, new software, updated software etc., none of which worked. By that time it was out of warranty so they won't help. On top of all that I now find out that my "Lifetime Map Subscription" is no longer valid because Garmin doesn't support the 2820. I'm starting to think Garmin sucks. Has anyone had any similar problem? Any fixes? Or should I just use this for a paperweight and go find another $700 piece of equipment ?