When June and Roger visit Diane at the hospital, the bed cover goes up to her neck. In a subsequent close shot, the cover goes up to her chin.
At the airport, when Joe gives the description of the getaway car to the detectives, he tells them that it was a Mercedes. It was obvious that the getaway car was a Cadillac limousine.
At about 7:34, and again at 10:30, blatant and obviously LAX, not New York, for the airport scenes. The recording, "The White Zone is for the immediate loading and unloading of passengers only" is unique to LAX only, very well known. Also, the entrance to the airport doors and the extras walking into the airport, so obviously are Los Angeles.