During the scene where the manager comes to the house, passing all the news crews, the door of the house has three small windows in descending order. Once inside the house with Rocky's wife the door in the background has an arched window instead of three small windows.
In the scene where Rocky is flying to New York from Chicago, the picture of the plane in flight is reversed (see the airline name in backward lettering). It was probably intentional so that the plane would be heading from left to right. That is the way people would imagine the plane heading, since that's the direction on a map.