Continuity mistake: After Norrington orders his men to take young Will below, in the next shot young Elizabeth stands at Dauntless' stern, in front of the mizzen mast and rigging, with the yard arms behind the mast way above her and its full sails. However, in the next close-ups the yard arm and sail are directly behind her, and the sails differ. (00:04:20)
Continuity mistake: After Jack slams the boom into Will aboard Interceptor, then brings him back on deck, Jack points the sword at Will. In Will's close-up, the sharp edge of the blade actually faces Will's neck - the hand guard is at Jack's knuckles. However, in the next shot, a close-up of Jack, as Jack still points the blade at Will, BEFORE Jack flips the sword over, it is apparent that the sharp edge of the blade faces away from Will - the hand guard is at Jack's fingertips. (Though this is visible on the DVD, a better view is on the video.) (00:50:10)
Continuity mistake: Jack cuts the ties of Elizabeth's corset and drops the knife down vertically, with the blade pointing up, right beside her head. In the wide shot, just as Norrington runs up, the knife is now horizontal. No one touched the knife. When he removes the corset, in Jack's shot, he hands it to Murtogg to hold and puts his hand down. In the next shot of Murtogg, Jack's hand is still on the corset. (00:16:35)
Continuity mistake: Aboard Interceptor, Will says, "I'm not a simpleton Jack," Jack is near the wheel and tightening the line at the belaying pin on the rail. There's also a line going through a wood cleat on the rail next to the belaying pin. When Jack causes the boom to slam into Will, the rail is seen and the entire belaying pin with its line is missing, as well as the line in the cleat. Belaying pins are permanent and these are not flipped shots. (This is the wood belaying pin that snapped off, hitting Depp in the knee during the mishap, when filming Interceptor's escape.) (00:48:40)
Continuity mistake: During the pirates rampage in Port Royal, Will battles with Grapple. The rope at Grapple's shoulder changes drastically in most of these shots, including going back and forth from hanging neatly, to not being there at all, to different amounts falling. (00:34:55)
Continuity mistake: At Isla de Muerta, during their duel, Barbossa kicks Jack in the face and he falls to the ground. In the first shot, Jack's arm and back land directly beside the spot of moonlight behind him. In the next close-up, his back and arm are at least two feet from that spot of moonlight, though he has not moved. (Difference visible on VHS.)
Continuity mistake: While Jack is inspecting the crew on the dock at Tortuga the sun shines from different directions in some shots. In some shots the crew's back is in shadow and in others their right side is in shadow. Also seen with the shadow of the goods in front of them, behind them, and to the left of Anamaria. This scene was shot during the course of a day. (01:01:00)
Continuity mistake: As young Elizabeth sings, the next shot from behind her to her right we see the cannonballs lined up at the bottom of the rail going around the deck. When she yells out, "Look! A boy..." Now there is a cannon in the corner of that bow. (00:00:45 - 00:02:20)
Continuity mistake: When Jack is being locked in the brig, he has something black on his hands when on deck, but as he is being locked away, they are clean. (01:17:00)
Continuity mistake: At the end of the movie when Will saves Jack you can see a blue sky in midday, yet when he kisses Elizabeth a few moments later, the sun is setting with shades of orange and yellow. The next scene (last scene in the film) we see Jack on the Black Pearl and the sky is clear blue again.
Continuity mistake: When Elizabeth's maids lace up her corset, obviously both the back and front laces were pulled very tight, as this is the reason for her discomfort and eventual lack of air. After Jack rescues her, as she is on his shoulder we see the two sides on the back of her corset are far apart and the laces in between extremely loose. Yet, when she is lying on the dock, Jack slices the front laces on her supposedly constricting corset so she can breathe again... (00:16:25)
Continuity mistake: While rescuing young Will, as Norrington shouts, "Man overboard! Man the ropes. Fetch a hook," Governor Swann is leaning over the starboard rail near the rigging throughout these shots. However, as Norrington says, "Haul him aboard," in this one shot Governor Swann's body is then seen on deck rushing to the rail with other sailors, where he already was in the previous shots. Also, a moment later the ribbon on the sailor hat lying on the tarp changes position in a following shot. (00:02:25)
Continuity mistake: As Jack and Will duel, the amount of closed buttons on Will's vest changes. After Jack says, "And now you have no weapon," three buttons are closed. When Jack says, "You need to find yourself a girl mate," four buttons are closed. Then up on the beams, in one of the first shots, there are three buttons closed. Coming off the beams, hanging upside down, four buttons are closed again. (00:24:15)
Continuity mistake: At Isla de Muerta, whilst floating offshore in the rowboat, when Jack moves forward to sit beside Norrington and discuss the plan, Mullroy sits behind Jack. In Murtogg and Mullroy's close-ups the silver medallion on Mullroy's white strap is centered properly at his chest. However, in other shots that silver medallion is near his waist.
Continuity mistake: When Port Royal is being attacked by the pirates, Will throws an axe into Jacoby's back. The axe handle lies flat against Jacoby's back. In the next shot, when Jacoby is lying on his stomach, the axe's handle is sticking up, perpendicular to his back, making it easy for Will to run by and grab the axe quickly. (00:31:15)
Continuity mistake: As Will first walks through the crowd at Jack's hanging, there is a wide shot. Then there is a semi close-up of Will and the surrounding people. Next there is a shot taken from behind Will, still showing some people around him. In all three shots as Will stands still, some of the people's positions differ and some of the people are different, in all three shots. (02:04:40)
Continuity mistake: After the scene in Tortuga, there is a shot with the moon, really big. The boat passes in front of it with a pan and when the boat travels further on screen, you see the moon again in the front, very small. The shot made it look like there are two moons. (00:54:00)
Continuity mistake: Aboard the Black Pearl, when Jack is speaking with Barbossa in the Captain's stateroom, Jack takes a bite out of an apple, close to its stem, with the stem at the top. However, in the following shots, particularly when Barbossa and Jack are on deck, the angle, position, and appearance of the bite mark differ between shots. (01:20:25)
Continuity mistake: At the blacksmith shop, in the close-up, the palm of Mr. Brown's hand faces upright, when he drops the bottle. In the wide shot, the palm of his hand faces down. When Jack approaches him, the palm faces up again. Also in one shot, one end of Mr. Brown's red scarf is sticking out of his smock and in the next shot, both ends are out. (00:21:05)
Continuity mistake: In Tortuga, on the dock, Anamaria slaps Jack twice. In the side shot, Jack says, "You'll get another one," and she picks up her right hand and points her finger right up into Jack's face. When Will says, "That one," Jack spins around, and in this shot when he asks, "What one?" now Anamaria's left hand is the one pointing at Jack's face. (01:02:20)
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