Same here, issue on 05-26-10 with the GPS.
Unable to get TOMTOM 7 to find the GPS, keeps saying there isn't a GPS device. Tried switching the ports, the various types of settings Navigator usually finds a GPS (Other GPS NMEA or internal GPS).
Quick GPS is on, wheather tab works fine, Google maps works like a charm ultra speedy.... really puzzling. I did notice that after installing TOMTOM though, a BTTray error flashed upon soft reset.
Looking forward to see advice from all your pros around here!!!