So far all i have done is get the main Nav/TV box and unplug and replug it in and it hasn't happened again (so far). i dont know if the connections just end up vibrating loose or what but I am going to keep an eye on it for a while longer. I really dont want to have to completely uninstall the unit just to find out.
I wasn't sure if that fixed it for me but I did that at havoc and didn't have another issue after that. Like you said, might just be vibrating loose. Do you have your nav tv boxes secured down?