Dr. Mitchell's watch rotates on his wrist between shots.
When Neal opens the folder the top page contains the picture of the man and he flips it up to look at the violin but, in the next scene, he is not holding it up. Then, in the next scene, he flips the top page and it reveals the picture of the violin is now on top when it was originally the second page.
Bryan's tickets says Haydn symphony no 1, but the concert is clearly not a symphony.