Continuity mistake: In the first scene of part 2 the Romans are relaxing in the bath. Then the arrival of Sheik Ilderim is announced, and when the camera switches to him the positions of many extras in the scene change, like one masseur in red (first kneeling, then squatting). (00:04:30)
Continuity mistake: One of the first shots in the picture is a wide angle establishing shot showing a street scene in Jerusalem, with milling people, animals, etc. A tall figure in the background is slowly walking toward the camera. The figure is Charlton Heston, and the shot is an earlier segment of a shot used later in the movie when Ben-Hur is returning home from a trade expedition. Heston's costume is the same, but he's only clearly recognizable in the second sequence. Since the two scenes are set 33 years apart, perhaps the earlier figure is Ben-Hur's father. (00:07:40)
Continuity mistake: When the Sheik is taking down the bets, his man, who handed him the book, is standing behind him with his hands down. When the camera angle changes, his hands are folded. (00:07:45)
Continuity mistake: At one time during the chariot race Judah and Messala are going side by side. Then Judah steers his horses against the inner wall and almost comes to a complete halt. However, an instant later he is abreast with Messala again. (00:26:00)
Continuity mistake: During the race, when Ben Hur is about to defeat Messala, his opponent's wheel disintegrates. However, as the chariot flips over, we see a complete wheel on both sides. (00:28:20)
Continuity mistake: Ben-Hur places his crown on a table when he visits the fallen Messala, but upon returning the table and crown are gone. (00:36:35)
Continuity mistake: After Tirzah causes the tiles to fall from the roof, there is a wide shot from above, showing Judah and Tirzah now standing at a different part of the wall than where the tiles fell. (00:46:25)
Continuity mistake: When Messala goes to the roof terrace after the tile incident, he checks the loose tiles. He drops one on the floor, and there are broken pieces on it that were not there before. (00:49:35)
Continuity mistake: When Judah comes back to his house and meets Esther, the curls over her forehead change several times throughout the scene. (00:52:00)
Continuity mistake: After Judah knocks out the prison guards he grabs a spear and busts into Messala's room. Two other guards standing far down the hall start running after him. Seen from inside the room, the guards enter directly after Judah. (00:52:15)
Continuity mistake: During his brief escape Judah threatens Messala who is standing behind his desk. The arrangement of things on the desk changes many times throughout the scene, most noticeably the three books on the right. (00:53:20)
Continuity mistake: When Arrius makes the galley do a practice race and finally allows them to rest the oars are going up and down from the waves. However, when the camera is close on Judah the oars are perfectly still. (01:10:55)
Continuity mistake: When Judah takes rest on his way to Jerusalem funny things happen with his headgear. First, when he lies down it suddenly disappears under his head. Then he falls asleep, and when Balthasar from Alexandria approaches him a little later and he quickly gets up there is nothing under his head and back. (01:38:00)
Continuity mistake: During the race, dolphin sculptures are tipped down to count the laps. Right after the third dolphin is lowered, there's a shot from below a horse and one can see that the dolphin is raised again. (02:46:55)
Continuity mistake: Judah Ben-Hur removes the large ring he had received from Arrius and gives it to Pontius Pilate to return to Arrius. Following this, he returns to the leper colony with Esther, and he reunites with Miriam. When Judah is told Tirzah is dying, as Judah searches the cave for Tirzah, he is once again wearing the large ring he had received from Arrius, on his right index finger. Then, that ring vanishes when he finds Tirzah.
Continuity mistake: Count the number of chariots that start the race. Then count the chariots that get thrown out and the number that finish - there's one too many. There are 9 at the start, 6 get thrown out, and 4 finish.
Continuity mistake: When Judah goes to the place where the leper lives, a man tells him it's a cursed place and puts a lettuce or a cabbage on a plate. It has disappeared the shot later.
Continuity mistake: Right before the chariot race, when Sheik Ilderim is standing at Judah's right side and tells Judah, "Be careful, don't let him near you," Judah places his hand on the Sheik's forearm as the fanfare starts. Then it cuts to a long shot, with the Sheik now suddenly on Judah's left side, and Judah removing his hand from the Sheik's forearm.
Continuity mistake: During Ben Hur and Messala's duel on the chariots, Messala's wheel-scythes tear away most of the right hand side of Ben Hur's chariot. When Messala has been thrown and Ben Hur crosses the finish line a few moments later, however, the camera has zoomed out far enough to reveal that his chariot is perfectly intact.
Continuity mistake: At the end of the chariot race, a heavily bloodsoaked Messala is taken to receive medical treatment. While something is done to his legs out of shot (amputation, presumably) an orderly in a clean white tunic leans his whole body weight on Messala to hold him down on the bed as he writhes in agony. When the orderly stands up, we see that his tunic is still spotlessly white.