One problem related to windshield has been reported for the 2007 Toyota Scion Xb. The most recently reported issues are listed below.
I parked my 20069 Scion Xb in my garage for a few hours. When I returned there was a crack starting at the top of the windshield and went half way down. There was no way someone had been in there and there was nothing that could have hit my window. I took it to the Toyota dealer where I bought it they said it was from an impact. I then took it to a few of the local glass repair companies. They told me that it was a stress crack and the dealership refuses to fix it.