Continuity mistake: Distance between the guys when they find the ghost librarian decreases significantly between shots. (00:10:40)
Continuity mistake: When Winston says "I wanna make a phone call" to the guard in the jail, the guard closes the door of the cell twice. (01:10:45)
Suggested correction: In fairness, you do hear two noises, the second more subtle. I took it as the door taking an extra pull to properly close. You can argue that in the first shot we don't see the door touching the strike plate or frame, and in the second shot you don't actually see anyone locking it, but I am pretty sure that there are many doors that behave in a similar way in real life.