Continuity mistake: Toward the end, Thénardier is being dragged down the stairs after Marius took back the gold ring Thénardier stole off his unconscious body previously. The gold ring appears and disappears several times as Thénardier is being pulled out of the room, down the stairs, and out the door. At the end, Marius shows the gold ring to Jean Valjean as he is dying, which was last seen on Thénardier's finger as he was being pulled out the door.
Continuity mistake: In the scene early in the film, where Valjean is singing in the church (after the police brought him back to the minister for stealing the silver), he has a wound on the right hand side of his head (from being hit by the policeman's stick/truncheon). Depending on the camera angle, the size of the wound and its appearance alters- sometimes it is quite small and flat, other times raised. Also sometimes there is a trickle of blood from it and other times not.
Continuity mistake: In the scene where Valjean is captured and brought back with the silver, the officials that apprehend him take off their hats. However, a few shots later, when the Monsignor collects the silver back, the official who addressed him has his hat on.
Continuity mistake: When Éponine (Samantha Barks) sings "On My Own", towards the end of the song, her hands come into shot, they are immaculate and manicured. Immediately after the song, she goes into a building to retrieve Cosette's letter to Marius, whilst holding the letter her hands are filthy with dirt under the nails.
Continuity mistake: At the very end of the movie during the final song - the large red flag shows different amounts of wind from many directions to no wind. Worst of all during the final 15 seconds of the movie the big red flag final shot is played in reverse so the flag waves itself along with all the little flags. (02:29:26)
Continuity mistake: Near the end of the "ABC cafe" number, the fellow who sings "they will come one and all" puts his hand on the arm of his comrade. When the camera goes to a wide shot a second later, he has put his hand down. (01:20:00)
Continuity mistake: The weather changes during the "Do You Hear the People Sing?" number, both of them. Wide shots show that it's bright and sunny but the close ups of Gavroche show that it's raining.