And our house number isn't even on the Navteq maps, even though the house was built in 2001 and I have now logged a 'map error' with Navteq support 5 times, the last two even supplying them with Google Maps images and extract from our Post Office streets and postcodes database.

Navteq are quite shoddy in getting up to date mapping, and in fact on one of the 'updates' they actually undid an update whereby a road name had changed. They got it put right on the 2005 DVD and then undid it on the 2007 DVD