My Sat Nav froze completely on or about the 3rd time I drove my !st Edition 3 Litre Diesel . The radio cut off and the screen just froze . Also the speed recognition showed incorrect speeds for example 70 mph in a built up area !! Also the compass will appear on the screen and cannot be removed . The dealer is still waiting for Jaguar to give the go ahead for a system update . Any one else have these problems ??