My f900bt keeps rebooting after saying that it has done a fatal error in application when I try to access the maps withing one to two minutes of boot time. I was going to install the firmware update but was just going to send it back because I didnt see this in the list of "fixes" of the update. Is this faulty wiring, not grounded properly, or a firmware issue that is simply not covered in this batch of the updates. Thank you in advance for any help.