Were there re-shoots? Ricky's hair is way longer at the end than earlier in the film. And at the end of the film, Tom Hanks mentions Carol's 'haircut' -well, it's just a trim and it seems like they use that line to 'cover' the change in her hair.
In the scene where Ray is walking out with his wife and son to send them off to her sisters house, when the wife and son are in the jeep and Ray is talking to them there are no head rests on the front jeep, but when they are backing up you can see the head rests back in the car.