My navigation continues to shut down and reboot. Many times when this starts up, my car automaticalssy shifts into neutral when I come to a stop. I can manually shift to neutral and back to drive and this seems to reset the transmission. I have taken my car to the Honda Serivce center multiple times for this problem. They have been unable to diagnose the problem. The first time I took it in, they tried topping off the transmission fluid. Didn't resolve. The second time, they sent me to the Accura Service center. The Accura Service center throught it might be the Nav disc, so I ordered and installed the latest version. Didn't resolve. The third time (I believe) I provided a video of the car acting up and let them keep it for two days so the mechanic could drive it home. They still couldn't figure it out!!! This has been going on for at least a year and a half.