I'm new to TomTom (v1.6) on my iPhone 3GS. After just two days I think I'm going to like it. But the app seems to always want me to enter my iTunes user name and password when I start it up or when I finish a phone call and it returns to navigation directions. Any idea what is going on? I do just press "cancel" and the log in request goes away, but its constantly popping up and is getting annoying!