Continuity mistake: In the brig aboard the Pearl, Jack sees Gibbs' flask in the pooled water around him. He reaches for it, holds it upside down to his mouth to drink from. There are two successive shots of him holding it to his mouth and then moving it away. The left sleeve leaning on his knee and the position of the long striped cloth that he wears around his waist differs in both shots. Also, the item on the floor to his left is in a different position in both shots.
Continuity mistake: Jack chases after the monkey on the broken mast leading across to the Black Pearl. When he gets there, Barbossa says, "Why thank you, Jack." Barbossa's left arm is up and he's holding the rope. In that first shot, much of his white sleeve is out. In the next shot of Barbossa, the white sleeve is mostly covered. Then in his next shot, much of the white sleeve is out again.
Continuity mistake: Anamaria has her hands on Jack's shoulders in the front shot, just as she said, "The Black Pearl is yours," and then she removes her hands. In the next successive side shot, her hands are still on Jack's shoulders, she then removes them again as she smiles at him. Jack's left sleeve is different in both shots.
Continuity mistake: As the soldiers are firing at Jack after his escape, he runs across the footbridge. In the far wide shot, he crosses the center of the bridge and passes the man with the sack on his back. In the next close-up shot, Jack is just getting to the center of the bridge and starts to pass the man with the sack on his back.
Continuity mistake: When the coach leaves, Will walks down the steps. Both side gardens are edged with stones outside the front door. The driveway is also lined with the stones. When the pirates invade their home, Ragetti yells, "Up there." The front door's open and the stones are now lined up parallel to the front of the doorway, just past where the steps should be. Even if it's meant to be the stones lining the opposite end of the driveway, the distance of the far side and proportional size of the rocks are wrong.
Continuity mistake: When skeletal Pintel and skeletal Ragetti are in the rowboat their appearance and parasols differ between shots, and later, when Pintel attacks Ragetti in the wide shot, the two oars are each hanging off its own side of the boat. However, in the close-up one oar is now lying across the two sides of the boat.
Continuity mistake: When Jack and Will are walking under water carrying the boat over their heads, Will steps into a wooden trap with a buoy line attached. The trap is made of wood sticks and in each of these shots the style of the wood sticks is different. In the first shot, Will's foot goes through the top, and is at one side of the rectangle trap and the buoy line is at the other side of the trap. In the next shot, Will looks down into the water at the wooden trap, his foot is in the center of a square wooden trap and the buoy line isn't seen in this shot. In the next wide shot, he's dragging the trap as he's walking under water, and his foot is at the same side as the attached buoy line, which is seen in this shot, on a rectangle trap. The trap is then tied to Dauntless' rudder, and again this trap is styled differently than the trap in the previous shots. This has nothing to do with the angle of the camera.
Revealing mistake: In the wide shot of the Black Pearl chasing the Interceptor, because of its sailing speed the flag at the stern of Interceptor is upright and blowing hard into the wind. Aboard the Pearl, when Barbossa looks straight ahead at the 'speeding' Interceptor, the flag is down and not blowing at all.
Continuity mistake: After Will rescues Jack from the noose, they soon run up steps with the rope in their hands. At the top of the steps they encounter the two soldiers and proceed to trap both soldiers around the stone column. Just as the rope goes around them, one soldier loses his hat, yet when the rope is pulled behind the column by Will and Jack, he has it on and then loses it again.
Continuity mistake: When Jack holds the chain to Elizabeth's neck, when he flees, while he is flying through the air, when he throws the chain over the rope, as he slides down and then runs away, the shackles go from being over the sleeves to being on his bare wrists with his sleeves pulled up, then back over the sleeves again repeatedly. Then when Jack approaches drunk Mr. Brown, the shackle is on his bare wrist as seen from the front of Jack, but in the shot from his side, the shackle is over the sleeve. This continues throughout this entire scene; Jack's left sleeve goes from under the shackle to rolled up to his elbow then back under the shackle.
Revealing mistake: Almost at the end of the movie, after Will saved Jack Sparrow from being hanged, they run to the cliff and they are caught by the Commodore and his men. In this scene there is a close shot of Johnny Depp's face, where you can see that he is wearing contact lenses.
Revealing mistake: When Jack sees Will run toward the Aztec chest, he quickly slices his palm and parries with Barbossa. In the shot facing Barbossa, Jack strikes the sword out of Barbossa's hand, then as Barbossa spins around his right hand is empty, and we hear the sword falling in the distance. However, when Barbossa says, "Ten years you carry that pistol..." Barbossa is still miraculously holding his sword - the sword tip is moving at the bottom of the screen, as he speaks. (More of the sword is visible on VHS.)
Continuity mistake: The very first shot you see of Jack is a view from behind, when he is up in the crow's nest. He has two red pieces of cloth that are fluttering crazily in the wind out to the sides. In the very next shot the pieces of cloth are blowing upwards, not in the same direction as the previous shot.
Continuity mistake: When Jack is knocked out by the bottle he has one hand raised with a gun to shoot Will but when he is seen on the ground both his hands are up by his head. The gun-hand yes, fine, but the other one would be by his side or in a different position at least.
Revealing mistake: When the Interceptor's clubhauling and it shows the stern out of the water, it's obviously a model (although there was a real ship, they used a model for riskier scenes).