Continuity mistake: After Jack rescues Elizabeth, he slices the front ties of the corset she is wearing, and gives the corset to Murtogg. As he hands Murtogg the corset in the first shot, the corset is right side up, because we see the waist flaps at the bottom. In the next shot, as Jack's hand lets go of the corset Murtogg is seen holding the corset upside down with the shoulder straps at the bottom. In the next shot, a close-up of Jack, in the background Murtogg is holding the corset right side up, and the waist flap is seen.
Continuity mistake: When the redcoats surround Jack and Will, at the end, they are around them on all sides in some shots, but there's a large gap in others. And this is before they are told to lower their arms.
Other mistake: When Captain Jack Sparrow is swimming up to the surface after ripping the dress off Elizabeth, he is swimming with both of his arms because he has Elizabeth draped over his shoulder. There is a considerable distance between Jack and Elizabeth. Also, when both of them are close to the surface, not only are both of Jack's arms out swimming, it can be seen that Elizabeth's double also paddles with one arm to assist in swimming to the surface. (Slow motion makes this easier to spot, but isn't vital.)
Continuity mistake: Jack says, "That is a wonderful trick. Except, once again..." as he walks down the sloped cart. Behind him to his left are a chair, a barrel and between the two is a miniature ladder and some objects leaning on the wall. When Will cuts the rope of the overhead barrels, Jack (stuntman Tony Angelotti) stands on the cart and the ladder and other objects are not leaning on the wall between the chair and barrel.
Continuity mistake: On the dock at Port Royal, Jack is speaking with Murtogg and Mullroy, who are guarding the dock from civilians. Seen behind the Marines to their left is the vacant dock edge. Yet when Jack holds Elizabeth hostage, the same dock edge is seen, but in this shot the edge is now filled with barrels and sacks. No one was on the dock between these two scenes.
Continuity mistake: Barbossa chases Jack, who knocks over a small table and he yells, "Sorry." In the next shot, that table is rolling down, with its legs facing towards the wall, with the treasure beside it. Yet in the next shot from below, the table top is close to that wall, not the legs. Also, the arrangement and existence of some of the treasures lying all around differs in the front shot of Jack and the back wide shot.
Revealing mistake: Norrington says, "Gillette, Mr. Sparrow has a dawn appointment with the gallows..." and he's standing at the dock. When he says the name Gillette, there is an unobstructed view. Behind Norrington to HIS right is the bottom part of the mountain's rocky cliffside and we do not see Dauntless moored. At this angle the Dauntless should be seen, though the digital editors neglected to add it.
Continuity mistake: When Elizabeth first meets Will, he is so exhausted that he passes out. Elizabeth then examines the medallion around Will's neck (when she says "You're a pirate." Note that the chain is still around Will's neck in that shot, but in the next immediate shot, when Elizabeth turns to face Norrington, she hides the medallion behind her back. No where does it show that she removed it from Will's neck, and at the angle that she pulled the medallion towards her, it would not have slid off from around Will's neck.
Other mistake: When Elizabeth is watching the attack on Port Royal from her balcony, the Black Pearl is at least two miles away. And yet one shot is able to hit the house.
Continuity mistake: Ragetti gets hit in his wooden eye with a fork, which would cause enough damage to be noticeable but no damage is ever visible.
Audio problem: At Isla de Muerta, with his back turned to the camera, Norrington says, "Any attempt to storm the cave could turn into an ambush." Then in the front shot Jack responds, "Not if ..." Before Jack responds in the front shot, Norrington's lips are moving even though he isn't speaking.
Revealing mistake: When Jack and Elizabeth are marooned on the island, Jack wants to know why the rum is gone. Elizabeth sits down in front of Jack, and as he stands behind her, he puts his fists up to his chin in frustration. His right forearm does not have the sun and sparrow tattoo showing, although part of it should be. The entire tattoo would not be hidden under his sleeve, makeup simply did not apply it for this shot.
Other mistake: Ragetti's wooden eye always moves in sync with his real one. At that time, a prosthetic eye (wooden or otherwise) would remain stationary or move around independently from the real one. Even if this is a magical benefit of his 'cursed' state, it still moves in sync when he's transformed back into mortal form.
Continuity mistake: At the opening of the scene in the cave of treasures, Jack lifts up a well endowed golden statue, looks at it awhile and tosses it back into the pile, as he clues Will with talk of honesty and dishonesty. Later in the scene, Jack and Barbossa are fighting in front of that same pile and the golden statue that Jack had thrown earlier is now sitting upright behind the chandelier.
Continuity mistake: When Jack and Elizabeth are on the island Jack lifts the hatch to the underground cache of rum. In the first shot from below, the top stair is visible at the opening above. In the next shot from above the design/shape of the top stair is very different. Bramble disappears between shots as well.
Continuity mistake: After cutting the corset, Jack picks up the medallion in a close-up shot of Elizabeth and her hand is next to her head. In the next wide shot, as Norrington rushes over, her arm is stretched out, up past her head. In this wide shot, the neckline of her slip is different than the two close-ups, before and after. In her next close-up, her hand is back near her head again.
Continuity mistake: During the pirate attack on Port Royal, Will opens the door of the blacksmith shop, just as Jacoby runs past chasing a woman, and to Will's right, three men run up the stairs into the alcove as Will takes out his axe to start after Jacoby. In the very next wide shot of Will and the alcove, those three men aren't seen at all, but as soon as Will lifts the axe over his head to throw, one of those men from the previous shot is seen running up some stairs, past a shop.
Deliberate mistake: Johnny Depp's and Orlando Bloom's stunt doubles, Tony Angelotti (Jack) and Mark Aaron Wagner (Will), not only fight each other's 'alter ego' as well as other pirates and soldiers, they also duel directly with each other in the blacksmith shop in many shots. They are also too obvious in the scenes on Isla de Muerta, and during the rescue of Jack from the gallows, as they run and fight the Marines. There are notable differences between the two Jacks and two Wills within all the shots, throughout the film.
Other mistake: When Elizabeth stabs Barbossa, he pulls the knife out and there is blood on it. Why is there no blood on the sword later when he pulls it out of his stomach during his duel with Jack?
Continuity mistake: In the beginning, after the young Will is pulled on board, when Will says his name, the medallion is protruding out of his shirt. After young Elizabeth tells him, "I'm watching over you Will," in the next shot of Will, the medallion is completely hidden in his shirt, and his position differs between shots.
Audio problem: After Jack saves Elizabeth at the beginning of the movie, Norrington is searching his weapons. As he takes out Jack's compass he opens it and in the next shot you can hear the clicking of the closing compass although the compass is still open.
Continuity mistake: Near the beginning of the film, after Jack rescues Elizabeth and her father gives her a jacket, she stuffs the medallion down her shirt, Jack then takes her hostage, where the Medallion is visible around her neck.
Continuity mistake: At the end when Jack tosses the medallion to Will, Elizabeth is running towards them. It shows that she reached a certain point before he tossed the medallion. But when it cuts back to Elizabeth she is running the same space again.
Continuity mistake: At the very beginning of the film where we see Norrington walk up to the young Elizabeth at the front of the ship, the bow on his black hat is blowing in the sea wind, yet when he stops to talk to Elizabeth it is no longer blowing, then when he finishes talking to her, it is back blowing in the wind.
Continuity mistake: At the end of Jack and Will's duel, Jack says, "Move away," and Will replies "No." In this shot, Will's forehead is bare. Then when he says "No," again, there is some hair over his forehead. After Jack says, "This shot is not meant for you," the hair is gone.