My Zumo XT just started this today; It is mounted in the horizontal position on my bike and seems to work fine (proper orientation) around town. However, when I get on the highway it rotates to the "landscape position". All the words are sideways, map, compass, etc. are all rotated clockwise 90 degrees. (It is not the North Up option). I've previously used it on several trips and several hundred miles and it was just fine. The "Orientation" was set to "Auto". I've now set it to "Landscape" (which was Garmin support's recommendation) but haven't tried it. However, it should work in auto and has worked in auto?? I'm thinking that one of the gyros has gone haywire and wold like it fixed if so. Could a bad gyro affect tracks or other functions besides the orientation? Anyone else experienced this?