Character mistake: Jimmy is at work, feeling sick in the toilet. Two other employees are talking at the sinks. The man on the left is called Phil by his colleague at the beginning of the scene, but at the end of the scene, he calls him Simon.
Character mistake: In the scene where the warden gives Frank the rules of Alcatraz. The warden states that prisoners do not get to see newspapers or magazines. Later when Frank distributes reading material from the Library to D block, he offers the prisoners books or magazines. One prisoner is seen taking a magazine to read.