Mine upgraded successfully last night - 3:20AM PDT. My driver's side rear door latch stopped functioning (door wouldn't open from the outside - I could push in the door latch all the way and it would stay in when all the other doors were opening) earlier in the week. I called and the service guy said it was a hardware issue, so I scheduled a visit to my service center. This morning, after the update to 4.5, the door handle is working perfectly.