Continuity mistake: At her home, when Elizabeth bars the door handles to the dining room with a candelabra, Pintel and Ragetti burst in, breaking that candelabra. Visible to Pintel's left in this shot is a cushioned chair and a small table, with absolutely nothing on it. Yet, in the next wide shot of the dining room, there is now a large candelabra on that small table near the door. (00:33:25)
Continuity mistake: In Port Royal when Elizabeth is being taken by the pirates, Will sees her across the courtyard and she calls out, "Will!" In the first close-up as he begins to say, "Elizabeth," the crowd behind him differs greatly to the crowd seen behind him in the very next wide shot as he finishes saying, "Elizabeth," and then when Jacoby says, "Hello," in the next shot of Will. This is not due to people running around, it was simply shot at different times. (00:35:10)
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. (00:08:45 - 00:32:15)
Continuity mistake: When the Black Pearl is chasing the Interceptor, we can see Will standing at the end of the bow (front) of the ship. Later in the scene, we see him coming up from below deck, where he has been the entire time. Nobody in Jack's crew resembles or is dressed like Will. (01:21:15 - 01:22:45)
Continuity mistake: There are three sets of windows in the captain's stateroom - at port, starboard and stern - with three windows per set. Just before Pintel and Ragetti give Elizabeth the dress, there is an exterior shot of the Pearl, and all three stern windows are actually symmetrical vertically. However, in the interior shots, the first and third stern windows are vertically slanted at their outer sides.
Continuity mistake: At the blacksmith shop, one end of the cart that Jack and Will duel on later is resting on a wood bench. In the close-up shot of their feet, just before Jack says, "Ta," the edge of the cart is flush against the edge of the bench. In the wide shots, before and after, the edge of the cart is in the middle of the bench. This has nothing to do with the angle of the camera. (00:23:10)
Continuity mistake: After Elizabeth's failed blood ritual, the pirates complain to Barbossa. In this shot, Bo'sun says, "And it's you who brought us..." and Mallet is standing on his own small rock. In the next wide shot, Mallet stands with his feet apart, sharing the rock with Twigg, who's closer to Koehler now. In the next shot, a close-up of Bo'sun, behind him, Mallet is standing on his own small rock again. There are other wide shots, that Mallet is seen standing on the two rocks and Twigg is in the middle of the big rock, closer to Koehler. In other close-ups, Mallet is standing on his own small rock. (01:14:15)
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.
Continuity mistake: When the hangman's axe actually hits and cuts the rope, in the very next shot the view of Jack is between the hangman's right leg and the wood brace. In that shot, we see Jack start to go down and on the right, we see Will getting up right next to the hangman. Next are close-ups of the rope coming loose, Jack falling and Norrington pushing through the crowd. Then in the next shot of Will, he is just now getting up and then lunging at the hangman to push him over. (02:06:50)
Continuity mistake: When Jack sprays Will with the soot from the sack and kicks away Will's sword, he drops down the sack of soot onto his hat sitting on the fireplace. In the next shot, from behind Will's back, the sack of soot is not on Jack's hat, but way behind it. (00:26:20)
Continuity mistake: On the Black Pearl, just before Elizabeth spins the wheel on deck and knock's off Grapple's skeletal head, when she first approaches the wheel, it is fully wound up with rope. As she starts to spin the wheel, there are only about five lines of wound rope, next to the wheel. (00:59:25)
Continuity mistake: When Jack dives in to save Elizabeth, his hands are relatively clean. Yet, back on the dock as Jack rips off her corset, his hands look as if he dipped them in oil and mud.
Continuity mistake: After Jack's attempted hanging, Will and Jack run with the rope and after knocking down the first three soldiers, they encounter another two at the stairs. In the first side shot, the two Marines trip over the rope empty handed and are almost at the ground. Yet, in the next front shot they are just tripping over the rope and they both have swords in their hands now. Also, Jack is higher up on the steps in the second shot. (02:07:10)
Continuity mistake: When Elizabeth puts the silver candelabra upside down on the door handles, the left handle is hanging down. In the next shot, that door handle is sticking straight out. No one touched it. (00:33:20)
Continuity mistake: After the credits, Barbossa is shown lying on the treasure pile. The Aztec chest is up at the top and the lid is closed and straight. (It was also shown with the closed lid when Jack asked Will to drop him off at his ship.) Then, in the last shot, when the monkey jumps up onto the chest, the lid is on the Aztec chest, but it is partially open now. (02:22:10)
Continuity mistake: When Pintel and Ragetti go after Elizabeth in her home she knocks Pintel out cold and drops hot coals from the bed warmer on top of Ragetti's head. In the close-up as Ragetti yells, "No! No! It's hot!" he holds the flaming torch in his left hand. However, in the next shot as Pintel yells, "Come on!" the torch is gone, it is in neither of Ragetti's hands and of course when he leaps over the banister he has the torch again. (00:32:50)
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. (00:11:45 - 00:18:40)
Continuity mistake: At Jack's hanging, there is a shot of Mr. Cotton's parrot landing on the flag post, that Mullroy is holding. In this shot, there is a gruff looking man and a woman with her hand on her hip, standing there. Those two particular people are in the middle of the crowd near Will, when Will first walks through the crowd, to stand in front of the scaffolding. (02:04:45)
Continuity mistake: Just as Will jumps on the rail of the Pearl with the gun, in the back shot, his right hand holding onto the rope is shoulder level and wind is blowing his hair towards his face. In the next few front shots, his right hand holds the rope between sternum and waist level and his hair is not blowing at all. Then in the next back shot, once again his hand is at shoulder level on the rope, and the wind is blowing his hair towards his face. (01:31:25)
Continuity mistake: When Elizabeth faints and is falling into the water after Norrington's proposal, there's a shot of her from on the rock. You can see her hat and scarf falling right after. But when the shot moves to Jack and the two guards on the ship, Elizabeth is falling and there is nothing above her - where are the hat and the scarf? There is plenty of time to see the hat and scarf fall too, if they were actually included in the shot, but they simply weren't. (00:15:00)
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