Continuity mistake: When Elizabeth walks the Black Pearl's gangplank, we see that it is long and out of swords' reach. When it is Jack's turn to jump, the crew is up on him (with swords) because Jack is at the start of the plank. Barbossa then throws the gun into the water. Then, when Jack takes off after it, his dive is taken from the end of the plank without having moved there.
Visible crew/equipment: As Norrington says in the wide shot, "Jack Sparrow, isn't it?" to which Jack replies, "Captain Jack Sparrow, if you please sir," there is a black-haired crew member wearing a white shirt who is crouched down behind Jack. Really! He's also visible when Mullroy says, "These are his sir." (Visible ONLY on the video version.)
Factual error: Captain Norrington is "promoted" to Commodore. However, commodore was not a rank in the British navy (it is now, not then), but a posting. A post captain could be appointed commodore (meaning he commanded more than one vessel) for a specific task, but when that task was completed, he became a post captain again. A promotion would have made Norrington an admiral.
Factual error: When Will delivers the new sword to Governor Swann, look behind Governor Swann. There is an oval painting hanging on the wall. It is a Thomas Kinkade portrait, which would never grace the walls of the mansion. Thomas Kinkade is a modern artist.
Visible crew/equipment: On the dock, when Jack grabs the rope, flies up and escapes, the cannon comes crashing down onto the dock. When the wood planks break (pre-cut wood), two Marines fall into the hole. Seen hanging under two of the remaining fixed wood planks are strips of tape that was used to help secure the pre-cut wood together with the fixed wood. Another view of this is also seen on DVD 2.
Visible crew/equipment: When Jack and Will duel, Jack says, "You need to find yourself a girl, mate," and he takes a mallet from above, Will ducks. In the next back shot of Will as he ducks, the back, left flap of his vest goes up. There is a battery power pack secured with black tape to the left side at the back of Orlando Bloom's pants' waistband. There are several shots during this scene when a small bulge under the back of his vest can be seen.
Visible crew/equipment: Will grabs the red hot sword and during the 'white light', Will's sleeve becomes translucent so the cable attached to the hilt is seen inside Will's right sleeve. When Will thrusts his sword at Jack's legs, the cable's seen again and the bulge under the vest is from the battery pack. In the close-up, their arms in the air, Will's left hand is about to grab Jack's wrist and the cable is seen openly at Will's wrist, going from the hilt into his right sleeve. The cable's hidden in Orlando Bloom's shirt and is powered by the battery pack (mentioned in another mistake), to supply the power for the spark effect of the sword. (On disc 2, Marc and Tony, rehearse this particular sword sequence and the two cables leading from the hilt are seen dragging on the floor as they duel. On the video, the cables are visible on Johnny and Orlando.)
Continuity mistake: At the beginning, when young Elizabeth is holding the medallion and spots the Black Pearl, we can see part of the medallion's back. It's an Aztec design, not a skull. At Elizabeth's blood ritual, when the medallion is dropped into the chest and spins over itself, both sides of the medallion are the same Aztec skull.
Visible crew/equipment: At the blacksmith shop, after Will grabs the sword out of the fireplace just as he and Jack begin to duel around the post, in the wide shot, black straps with attached wire cables are clearly visible around both Johnny Depp and Orlando Bloom's right ankles. (This is only visible on the video version).
Revealing mistake: Aboard Interceptor, Jack calls out, "Monkey!" as the monkey jumps onto the broken mast leading to the Pearl and Jack runs after him. In the very next shot of Elizabeth, who's trying to move the broken rigging from the hatch that Will is trapped under, the coloring is off in this one shot. The color of her dress, for example, is not vibrant, it is brown. This is visible on the region 1 DVD and on videotape.
Visible crew/equipment: During Jack's escape, he swings about on the rope. As he does, in the shot immediately following Jack's first close-up, the film crew's blue flat-topped boat, as well as their speed boat with its trailing wake, are both visible at the bottom left of the screen. Really! (This is ONLY visible on the video version.)
Visible crew/equipment: As Norrington and his men board the Dauntless he says, "Search every cabin, every hull down to the bilges." In the next shot a crew member with a white baseball cap and green shirt is actually visible hiding under the gangplank. (This enjoyable shot is ONLY visible on the video version.)
Visible crew/equipment: As Will and Jack duel up top in Brown's shop, in two close-up shots a large plank is visible at their feet with two long black marks along each side detailing where the beams are supposed to be, so that Orlando Bloom and Johnny Depp know where to land as they supposedly leap from beam to beam and feign keeping their balance. (This is ONLY visible on the video version.)
Continuity mistake: As Will holds the sword above his head to block Grapple's grapnel, the cloth (the same one he wears around his neck when his sleeve is pulled down) that is tied around his right wrist is visible. He is soon rendered unconscious by a pirate's candlestick. When he wakes he puts his right hand to his aching head and the cloth's knot is visible. The cloth is wrapped completely differently in the two shots, though he never had the chance to change it.
Continuity mistake: While standing near the Aztec chest, Will says, "He didn't waste it," and in this shot there are two buttons closed on his vest, over the belt buckle. Yet, in the close-up of Will's hand dropping the two pieces of gold, there is only one button closed on his vest, over the buckle.
Continuity mistake: A bit after Jack says, "You need to find yourself a girl mate," Jack tosses a mallet at Will. As Will ducks, in this shot the hose on both legs are rolled down to his ankles. Yet just after Jack says, "Or perhaps the reason you practice 3 hours a day...You're not a eunuch are you?" Will's hose are obviously pulled up properly. Orlando Bloom wore the hose rolled down during much of the shoot, when it was supposedly not visible onscreen. (This is ONLY visible on the video version.)
Continuity mistake: When Elizabeth is taken captive and escorted to the Black Pearl to meet Barbossa, the Moon comes out from behind the clouds, her captors should have changed into skeletons. They were escorting her to the ship and would have been exposed to the moonlight. Elizabeth should have first noticed then, not when Barbossa explains it to her later.