My new Nav VI has crapped out and is being replaced under warranty. It worked fine for a couple of months but recently started losing its screen. On boot up, all was fine. But, after a short while, the map would start shaking and the vehicle icon would then creep off the screen never to be recovered. The same would happen if I tried to scroll the map. The map would start shaking and I could not recover my vehicle icon to the center screen position. After a while, other non-related screens would pop up. I updated my software and maps and Garmin tried to diagnose over the phone. We couldn't even get the screen calibration feature to work. Just a heads up to anyone else having similar issues. .