Lately when I bring up Google Navigation the map screen locks up before the map comes up (all that is displayed is the Google Navigation Beta logo). Eventually the phone will allow me to kill the Ap. Then a few minutes later my phone totally locks up. This is consistantly happening no matter where I am. I have all updates loaded. I tried to uninstall Nav, but cannot. Using Samsung Galaxy S model SCH-1500 firmware v2.3.5 I appreciate any help I can get!