Last week I was in Shenzhen, China. I try to turn on my 3790SG/MY with China NT 2012.30 in it, after satellite lock-on, I find out the map is way off form my location about 3~400m, either in walking & driving mode, I'm not sure it cause by the map it self or cause by the base-map(which I did not change to CN base). Any1 have any idea? Thanks.