Continuity mistake: In the scene where she received the wounds to her head she runs from the night-club back to her apartment where the priest is waiting for her. She runs down an alley and he pursues her. As he sets of his coat is buttoned-up, then as he goes down the alley it is undone, and as he comes round the corner to where she is hiding it is done up again.
Continuity mistake: When Frankie is in the bathtub and is about to be stigmatized for the first time, (wrists), you can see she's wearing a nude colored bra. In the next underwater shot she is completely naked.
Continuity mistake: After she receives the head wounds, the next scene she is on the roof of her apartment, she takes out the brown cloth and reads it again, and stands up, in this whole scene the head wounds are gone, in the next scene she is talking to the priest and the wounds are back again.
Continuity mistake: When Frankie lifts her bandages to show the priest her wounds, you see that there are no wounds, just blood.
Continuity mistake: In the cafe scene, watch the bottle of beer in Byrne's hand. When he says "alcohol was invented by monks", he lifts the bottle to take a drink. The camera cuts to a wide shot, and he is finishing a swallow of beer. In another shot he puts it down and you can faintly hear a "clink" as it touches the table. There is a cut to a shot of both of them, and Byrne is moving the bottle towards the table. As it touches, it clinks again.
Continuity mistake: In the apartment scene when she attacks him, just after they kiss, in one shot they are virtually touching, in the next they have jumped apart.
Continuity mistake: In the scene in the subway, you see the train from the front two times, and it is a gray train, but you can also see a pole sticking out of the front window. When the train gets to the station, it is a red train.