This has now happened to me several times. If I leave my car parked in the sun for too long, when I come back, the card will have re-set itself. Acting as if I had removed it and re-inserted it. Let me explain, I usually listen to my PC Card on Random. As you probably know, it will jump from folder to folder. But occasonally I've gotten in my car only to notice that the Random feature is no longer active and its now playing track 1. Each time this has happened it has been after the car was sitting in the hot sun for an extended period of time. Anyone else experiencing this? Anyone have any ideas of what it is?