Went for a 50-mile ride today, following a course. The 1050 automatically rebooted five times during the ride. First the screen would go completely black for a second or two. Then two words in tiny letters appeared in the center of the screen. The second work was "diagnostics." I never could make out the first word, because the lettering was so tiny. Then after a couple seconds the unit would reboot. After rebooting, the screen, including the map and parameters, would return to the state it was in when the unit went black. Even my Varia reconnected. All this happened automatically; I never had to touch anything. When the screen came back the ride was paused. After "unpausing," the Edge performed perfectly, until the next blackout. The common denominator was that every time the unit went black, I was negotiating a turn at an intersection, either in the middle of the course, or after going off course and then rejoining the course by turning at an intersection.