Corrected entry: After the wedding of Buttercup and Humperdinck an old man wearing a big crown escorts Buttercup to the bridal chamber. The king is supposed to be dead, succeeded by his son - so who is the old man?
Lynn F CarterCorrected entry: When Westley and Inigo are dueling, Westley disarms Inigo by knocking his sword high into the air, which Inigo subsequently catches. But a crew member caught the sword and dropped it back down to Inigo, and you can see him running away at the very top of the screen, far to the left. (00:24:21)
Correction: I have reviewed this scene in slow motion time and again - the only thing I see is a small metallic flash, not someone running. Could this be a duplicate of the 'boom mike' mistake from the pan-and-scan version?
Corrected entry: When Westley is being tortured on the table, the lever which operates the machine is graded from one through ten. Later, when Prince Humperdinck decides to kill Westley, he pushes the lever all the way up, which now has a top value of fifty, instead of ten.
Correction: The machine is labeled by ones up to ten, then by tens up to fifty.
Corrected entry: When Vizzini accepts the battle of wits with Westley, Westley states that the poison he has is "called iocane powder. It is odorless, tasteless, dissolves instantly in liquid, and is among the more deadlier poisons known to man." How is that when Humperdinck finds the empty poison packet later on, he identifies it by sniffing it? Pretty clever for an odorless poison . . .
Correction: His precise words are "Iocane. I'd bet my life on it". From the wording, he doesn't actually know for certain, but he's pretty sure. From the evidence of a dead body with no wounds and a vial of odorless powder, Humperdinck is making an assessment that is, in this case, correct.
Tailkinker
Also, it's a good joke that shows Humperdinck to be a smarter villain than Vizzini (who literally bet his life on it and lost).
Correction: He identified the powder not from an odor, but from the complete lack thereof.
dizzydCorrected entry: Look closely at Buttercup's wedding dress at the actual "wedding". It's ice blue with a white petticoat or whatever under it. It stays the same until where she jumps out the window in the end and lands neatly in Fezzik's arms. Watch her falling - her dress changes to purest white to contrast the night sky better.
Correction: Tough to call this one - the dress isn't really blue, at best it's a silvery-white with a blue cast to it. It's just that against the dark black background, it appears whiter. You've sort of got the cart before the horse.
Rooster of DoomCorrected entry: At the end of the movie, Buttercup and Westley reach for each other twice. Once when the grandfather reaches the end of the book and again when the grandson tells him he doesn't mind kissing.
Correction: The grandpa reads it twice, so we have to see it twice.
Corrected entry: Where on earth did Vizzini get wine, cups, and a tablecloth from, in the middle of a meadow?
Correction: Vizzini carries a small bag with him. Being an 'aristocrat' in some ways, he carries these with him.
Corrected entry: As Buttercup rides up to the three kidnappers, notice that only Vizzini and Fezzik move. Inigo is actually a cardboard cut-out.
Correction: He blinks, so he's probably real...
Corrected entry: In the scene where Wesley and Buttercup roll down the hill, when they get to the bottom, they are far apart on the wide shot and close together on the close-up shot.
Corrected entry: In the scene where Fezzik is putting Inigo's head in a bucket of water, every time he dumps Inigo's head in the water, you hear his deep breath. Not when his head is pulled out of the water.
Correction: It's not a breath, it is Inigo trying to shout a protest while his head is under water. It sounds just the way it is supposed to.
TwotallCorrected entry: When Buttercup finds Westley in the honeymoon suite and jumps on him on the bed, her stockings and shoes are black. When she jumps from the window into Fezzik's arms, her stockings and shoes are white. I doubt she changed in front of Westley, Inigo, and Prince Humperdinck.
Correction: I just watched this in slow motion, and she is wearing white stockings and shoes the whole time. When she jumps on the bed, you mostly see the black (dirty) underside of the shoes, so this might be mistaken for the color of her shoes, but they are indeed white on top.
TwotallCorrected entry: As Fezzik, Inigo, and Westley are developing their plan to storm the castle, Inigo says Humperdinck and Buttercup are getting married in a 'little less than half an hour'. It is bright and sunny outside. Next time we see them, before their master plan is carried out, it is dark, like it's the middle of the night.
Correction: Well, since no season is given at any point, it could very well be winter, making it very possible for the sun to go down within a half hour. Anyway it is just stated that the wedding starts within a half hour. It has already begun the next time we see Inigo and Fezzik. Actually they are so far in the ceremony all that is left to do for the coming man and wife is to agree to the terms of marriage, which takes quite a while. So much time could have gone by before we see Inigo and Fezzik, giving the sun plenty of time to go down.
Corrected entry: When Westley and Buttercup are in the fire swamp and he is explaining to her how they will be able to survive said swamp, he puts down his sword so he can lift her for a moment. He never retrieves his sword, but it reappears in his hand when he is cutting vines moments later.
Correction: If you look carefully he does indeed pick it up as he is passing behind the branches and roots, there is even the sound of the blade being removed from the ground.
Corrected entry: In the final scene, as Peter Falk turns to say "As you wish", his hair and mustache are nearly black, but throughout the movie they have been heavily whitened.
Correction: This is a repeat entry that has been corrected, I also double checked for myself, it is only the way the shadow of his face is cast over it. The bedroom scenes were all shot around the same time so it doesn't make sense that they would have done something to the color of his mustache between takes.
Corrected entry: When Grandpa is reading to the boy, first the boy's sandwich is whole, then there are some bites taken, then it's whole again.
Correction: The boy's sandwhich is cut in two pieces. so he probably just finished one and started on the other.
Corrected entry: In the scene where Buttercup and Westley are rolling down the hill, go into slow mo and pause it on their faces. The same stunt double played both parts.
Correction: The rules of the site are clear. If you need to use pause or slow-mo, it's not a mistake.
wizard_of_gore Corrected entry: In the scene with Miracle Max, the bellow is placed in Westley's mouth to put air into him. Westley, who is supposed to be incapacitated, holds the nozzle in his mouth. Facial muscles should not be able to move like that if he is paralyzed.
Correction: In all fairness, the movie never says he's paralyzed or even unconscious only that he is "mostly dead".
Corrected entry: In the final scene with the grandpa and the boy the grandpa's hair gray (as it was in the rest of the movie) but during a close up when he at the door about to leave his hair is dark brown. It changes back to gray right before he leaves.
Correction: It only appears dark brown due to poor lighting during that shot. If you look closely, you will see that his hair never actually changes color.
JazetopherCorrected entry: When Westley tells the dungeon keeper that he can bear torture, the keeper says that no-one can bear the machine. Yet when Westley is attached to the machine, the six-fingered man says that he has worked half a lifetime on it and that it has never been used before.
Correction: Yes, but the dungeon keeper knows how powerful it is and knows what it's capable of. He's just making a generalization that no one can withstand it.
Corrected entry: After Buttercup realizes that Humperdinck never sent the messengers and is calling him a coward, he grabs her and shuts her in her room, intending to lock her in since he grabs the key out of the lock. However, he immediately pulls the key out after shutting the door without turning it first- so the door is actually still unlocked. Since Humperdinck was intending to lock her in, it's unlikely that the character would have 'accidentally' forgot to lock the door, more likely the actor was just moving too fast.
Correction: Or he could have been so flustered at his deception being revealed that he truly forgot. It is pure speculation about what the actor was or wasn't doing.
shortdanzr 
Correction: The king was only dead in Buttercup's nightmare earlier in the movie.
Phaneron