I got my GN on release day. Since then I've driven to and from my in-law's house - about a 3 hour drive each way. Even though I know the route, I decided to try out Navigation on the way there. The phone got very warm (I didn't get an actual reading, but it was hot to the touch - much hotter than my DInc would have gotten), but seemed to perform OK. On the way back, I only turned on Navigation/Maps intermittently but ran Trapster for a good portion of the trip. Once again, the phone got hot. At some point I looked down and noticed it saying that I was driving 70MPH in a 35MPH zone?! I was on a freeway, but it showed me in a neighborhood nearly 1/4 mile to the west of my actual location. After I got home and the unit had cooled down, I opened Maps and my location was dead-on. I've also noticed Google Sky Map intermittently being way off. Has anyone else had similar trouble?