I've had my S3 for about a week now and loving virtually everything about it since upgrading from my HTC Desire. However, I've been using the Google Navigation and three times now the navigation has had two problems. 1) Twice the screen just went blank. This was after it went from portrait to landscape, and then I put it back to portrait again. 2) Just today the whole navigation just stopped and flickered. I was driving along and the location just didn't update and it seemed like it was ever so slightly flickering. Both faults were fixed by restarting the Navigation app. However, this isn't great to do whilst you are driving. Has anyone else experienced this and have any potential fixes, apart from resetting the phone?