Facebook Mashup Friends in the Wrong Locations

Has anyone come across this issue...?

1) I have created a Facebook - Virtual Earth mashup to show my friend's locations.

2) I had no problem generating developer keys and the mashup seems to work fine as friends do appear on the Virtual Earth map.

3) The problem is that my friend appear in some very odd (and quite amusing) locations. One of them is several hundred miles SE of the coast of Gabon in the Atlantic (he assures me that he is not there).

I am using the "City" field from Facebook to get Latitude and Longitude for the Virtual Earth plot, could the problem be that people have not completed this field in their Facebook profile?

Kevin

[704 byte] By [TravelKev] at [2008-2-25]