HI Robin how did u cure it. I also got the same problem. In the xml file it shows nuvi 13xx. I was actually unlocking the updated map from the garmin site, after unlocking. It said map unlocked successfully, and when I disconnected and started the device I got some new displays on my nuvi 1300. And following were the changes 1300 to 13xx, my navigation window was changed, before I normally used to have all the time to destination, speed, time and direction touch screens on right. (and immediately after the disconnection it changed to bottom - as shown in the garmin site).

Before unlocking I had the "North America gmap" folder inside my map folder of my SD card. And with this card inside my device I connected it on to my PC and unlocked the map. It said successful but nothing happened to my map. And at the start It asked which locality (US, Britain, and many more) and after that I got msg for my Xplorer maps (which I did not get it before).[I would also like to know whether the above has something to do with any updates in the webupdater - coz I was also updating some things]

ANd now I have no clue of how all the above happened. I reverted back to my previous INdia map inside my garmin folder and other maps inside the map folder (All in my SD card). And now my device is working normal as before but still has 13xx.

Thnks in adv