I go the OTA update to 4.3 today, but lost the Navigation icon. If I go into Maps, I can still get to navigation, so it works, just no icon. I went into play and "uninstalled" Maps and then updated it.. but still no blue triangle Navigation icon. Also tried searching on just "Navigation" in the Play store, but it seems the app is really part of Maps and not something to update/download separate. Anyone have an idea how to get it back?