Continuity mistake: In the scene when Hannibal returns from Lecter Castle after the murder, his aunt is waiting for him in his home. In the close up of the aunt Hannibal's collar is up, in Hannibal's close up his collar is down.
Continuity mistake: A policeman takes the dog tag from Hannibal's first victim's mouth (the one tied to the tree) with his bare right hand. Cut to a shot of him getting up and a glove has appeared. The camera has been on him so he has had no time to put on his gloves.