Has anyone experienced a problem with erroneous navigation data? Example: The navigation screen will show a distance to destination as 45 miles, I am travelling at 70 mph on the marked route and my time enroute to destination is 1 hour and 15 minutes. Basic math would show a time of about 36 minutes to destination if I maintained a constant speed of 70 mph. I contacted Zenrin (software manufacturer) and they said it was a hardware problem and to contact Nissan. Haven't contacted them yet, just wondering if anyone else has noticed this.