Corrected entry: Near the end of the movie Ewan is rejected, leaves Renee and then goes to the elevator. He pushes the down arrow. When the doors open, Renee is standing there. Not only is it impossible for her to get to the elevator in the time that Ewan approaches, but she would need to go down or up a floor, then run to the elevator AND click a button to get it and so on. My point is that it's impossible. Plus, they end up going to the roof when Ewan pushed the up one.
Corrected entry: In the scene where Barbara Novak is walking to the elevator after having caught Catcher with another woman, he chases after her. When you first see him he doesn't have the woman's grey hat on his crotch area, also not when he slides to catch the elevator door. Yet, in the shot where she says "and yet her hat's off to you anyway" he has the hat on his crotch area.
Corrected entry: After several shots of bookstores all over the world, Renee Zellwegger picks up the "New York Chronicle" and checks the "This Week's Bestseller" List, which ranks "Profiles in Courage" by former Pres. JFK on rank 2. But the book was published in 1957, the movie is set in 1962, when it is rather unlikely that a 5 year old book ranks 2.
Corrected entry: In one of the traffic shots of New York City, a Volkswagen Beetle can be seen in the background. The VW Beetle was not imported to the United States until 1963. The movie was set in 1962.