This problem has occurred at least 3 times since we bought the car new. The last time we were out to dinner in San Francisco with family and friends and parked on a busy street. When we came back to our car all of the windows and sunroof were open. Luckily we hadn't left anything of value inside and visible. Honda says that it is some communication between the key fob and the multiplex switch assembly inside the drivers door that causes this to happen. But, even though the car and accessories are under warranty, they won't fix or replace the unit because the problem is intermittent and they are unable to reproduce it to confirm the need for replacement.