When we crossed the Artic Circle something very strange happened to both our Zumo navigation systems: the brightness of the screen was reduced to 0% (and so the screen unreadable). What ever we did it just popped back to 0% every time. Because we both had the problem, we knew it was something with the software and it is: it seems that above the Artic Circle the Garmin Zumo has a bug. I could download an fix for Eddie's Zumo, but because I have a Honda OEM version - I still have this issue... :-(