I've been searching for a number of hours now with no luck as to a possible cause.
I got the updated google maps today (3.0.2) because I'd like to have the latitude thing to play with. With the new version, it appears as though it's not actually using the device GPS to plot my position. All it displays is my location within 900m, which is obviously the triangulation of my position with in the towers.
I've got all the application permissions set to 'allow' and that hasn't changed anything.
Recently downloaded version 4.0.2 and was able to track my trip as I moved along. My wife had the same problem with triangulation but once she re inputs MY LOCATION it helps. She is not a berry user!