Do not know if this has been discussed, could not find a thread about it. Occasionally with strong 3G signal the nav screen goes black losing the satellite image. The red arrow for the car continues to travel but everything is dark. If I hit the satellite tab I will get the map. My thought is that there is a satellite issue at the time this happens, never lasts for more than 10 or 15 minutes and it will eventually come back. Only has happened 3 times in 2 months of ownership. Any thoughts are welcome.