Revealing 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. (00:24:45 - 02:07:00)
Continuity mistake: When Barbossa looks through his telescope at Interceptor, before Jack says, "I'm having a thought..." she's a good distance away from the Pearl and all her sails are out. Then in most of the wide and close-up shots of Interceptor, some of the sails differ at the bow and stern. Sails raised in one shot, are lowered in another, then some raised again and also some are raised but blowing wildly, then in the successive shot, it's down and still. Their proximity varies throughout and there are way too many changes between shots. (01:20:45)
Revealing mistake: When the pirates arrive on shore at Port Royal, Ragetti and Pintel are standing in front of the boats. Ragetti has his false wood eye in his hand, as he sharpens the 'iris' with his knife point. As he does so, the eye socket does not look empty in this shot, only covered. (00:30:45)
Continuity mistake: When Jack walks down the dock to the Interceptor, Murtogg and Mullroy are sitting with sacks, crates and barrels in a deep shadow, but the sun is seen afar. A few shots later, after they intercepted him, those same sacks, crates and barrel are brightly lit by the sun. The shots were probably filmed at different times of the day. (00:11:45)
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. (00:20:30)
Continuity mistake: Jack hides behind a statue outside the blacksmith shop. The soldiers run past a woman and her vegetable cart whose wheels are closest to the blacksmith shop. After Jack removes his sword, he looks around the courtyard. The cart's legs are now closest to the blacksmith shop and the wheels are now at the other end, the complete opposite of how the cart was positioned in the first shot. (00:20:35)
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. (00:16:45)
Continuity mistake: Will goes to the fort and pleads with Norrington to find and save Elizabeth. On the table are two distinct feather quills. They're in different positions in the wide shot and in the close-up when Will slams the axe down on the map. Also, in that wide shot, there is a small bottle in front of the quill holder, whereas in the close-up, the small bottle isn't there. (00:41:40)
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. (00:03:50)
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. (01:51:40 - 01:52:40)
Continuity mistake: When Elizabeth is hiding from the pirates in the closet, and the pirates first enter the room, you can see that the carpet is folded back (from her opening the door) quite a bit. When the pirates see the carpet pushed back and know where Elizabeth is hiding, just a small corner of the carpet is pushed back. (00:33:35)
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. (00:20:20)
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. (00:31:10)
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. (01:29:50)
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. (01:36:00)
Continuity mistake: When Elizabeth asks, "Well, then can't we lose them amongst those shoals?" in the front shot, her hair is in front of her shoulders and in the side shot, her hair is behind her shoulder, on her back. This occurs many times throughout the film with Elizabeth's loose, long hair - wet and dry, such as on the dock, after Jack rescues her in Port Royal, and after Will rescues her when they board the Interceptor. (01:21:40)
Continuity mistake: Pintel yells out, "How do we tell?" and his jacket is covering a reasonable amount of the white shirt underneath. In the next shot of him when he's shot by Barbossa, more of the white shirt is visible, so the bullet hole can be seen. (01:12:50)
Continuity mistake: When Elizabeth first boards the Black Pearl, in some shots the end of the sleeves of her white nightgown are seen with the sleeves of her floral robe, yet in some shots the white sleeves don't show. Also in some shots, when the white sleeves do show, the amount of white sleeve varies. (00:38:00)
Continuity mistake: In the blacksmith's shop, on the two stationary wood posts near the donkey, that have the assortment of swords hanging, the direction of some of the sword handles change in some shots. Seen in the background of some shots or when Will grabs for a sword. One example is, when Jack looks at the red hot poker after poking the donkey and when Will comes in, jumps down the step, then stops the donkey. (00:21:45)
Continuity mistake: In the morning, when Will is with Jack at the prison, Will has scratches on his right cheekbone and jawbone and the left side of his forehead. However, after they commandeer the Interceptor, all of Will's scratches are barely even noticeable, but it is STILL the same day. (00:42:30 - 00:52:15)
Answer: The curse needs the blood of everybody who took a coin from the chest. All the other pirates have already contributed so, as the movie opens, the only blood needed is Will's, substituting for his father. During the finale of the movie, Jack takes a coin from the chest, adding himself to the curse, so his blood is now required as well as Will's.
Tailkinker ★
But I didn't see any blood on the coins, and none of the pirates cut themselves, even before Will became part of the mix.
Yes, the other pirates did cut themselves before Will came into it, off-screen. The lack of blood on the coins can simply be explained as most of it dripping to the bottom of the chest, it being washed away by storms blown into the cave, or by the fact that they didn't drop that much blood on it in the first place.
When they had Elizabeth they believed she was Bill Turner's daughter, but they all thought the curse had failed, none of them had cut themselves so it makes zero sense.
They had been collecting back the coins for years. During that time they repaid their own blood. All they needed was the last coin and the blood of Bill Turner to break the spell.
lionhead