i use a 4g nano and i have had the same problem as everyone else. I had to unplug and replug it in at least once a day.The ipod stays in my car all of the time.
Here is the difference:
Yesterday i started my car and the ipod connection failed. Now it will not connect at all. Every time i connect it it says connection failed immeadiately. tried restarting the unit, restarting the car, wiping the ipod clean and putting music back on it, and finally i tested the usb on the head unit with a flash drive. Nothing will help. has anybody had this problem?