I'm beginning to believe there's a gps position lock issue with v27. I've had my gps suddenly loose all satellites on 3 seperate instances now. These all happened while driving where the car was previously in GPS mode. In all instances, my display went from "GPS" to "bare earth" (no satellite dots). Going into service mode showed the GPS in "satellite search" mode. Almanac data was in use but the SNR screen showed zeros for all satellites. Mysteriously, after leaving the car in the parking lot and returning later in the day, the problem had vanished. A quick check of all connections to my GPS unit showed no problems and I can't believe that I had a hardware problem crop up whose timing was precisely coincidental with the time I did my v27 upgrade.

I'm betting this is a firmware issue based on other posters who have seen the same situation crop up. This may also be why CortinaD's service advisor said that BMW is advising not to install v27. Interestingly, although I'm not sure how, this may somehow be related to the 2006.2 DVD that I now have loaded which I recently purchased from NavTek.

I'm now eagerly awaiting v28...