Continuity mistake: When Bond is tied up with Solitaire and turns on his watch - only the gas bullet comes flying. But that could not be the only loose metal object in the room. Kananga's blade for example. And even if he held on to it he would feel the magnet pulling it.
Revealing mistake: When Tee Hee and Bond are fighting in the train compartment, watch the right edge of the screen. In one of the shots the end of the set is visible as Bond shoves Tee Hee against the "wall", which wobbles. So much is revealed you can see the wooden framing.
Revealing mistake: As "Tee Hee" (the man with the claw) escorts Bond to the alligator pond at the farm, they at one point stand next to each other. You can see that Tee Hee's prosthetic arm is much longer than his real one- about as long as you might expect it to be, if the actor is really holding a prop with his actual (and perfectly good) hand.
Factual error: Clifton James' character is "Sheriff J. W. Pepper of the Louisiana State Police". A sheriff is not part of any state police organization - a sheriff is an elected COUNTY official. (Interestingly, in Louisiana, they are not called counties, they are called "parishes").
Other mistake: When Bond is sky-surfing on the back of the other agent's boat, you can see a shadow above the skysurfer. Why would there be a shadow in the sky?
Continuity mistake: When approaching Solitaire, the voodoo priest's grip on the snake changes between shots.
Revealing mistake: When Madeline Smith (The Italian agent credited as Beautiful Girl) emerges from the wardrobe / closet, she embraces Roger Moore. He then uses his magnetic Rolex to pull down the zipper on the back of her dress. If you look closely, you can see the cable/wire under dress pulling the zipper down. (00:11:20 - 00:12:00)
Other mistake: When Tee Hee strikes Bond to supposedly knock him out, he makes contact with Bond's right shoulder blade. He doesn't strike anywhere near the neck/head region, which is where you would hit if you were trying to knock someone unconscious.
Character mistake: When Rosie points the gun at Quarrel on his boat, she says she might have shot him. He says she might even have killed him if she had taken off the safety catch. Like most revolvers, the Model 19 .357 Magnum has no safety.
Character mistake: When Rosie sticks her revolver in Bond's room and Bond flips her onto the bed, Bond incorrectly identifies the gun as a Smith and Wesson .38 which would make it a model 10 or 15. It was actually a Model 19 .357 Magnum.
Other mistake: When James kills the snake in his bathroom with the flame from his cigar and the aerosol, the carpet doesn't appear even singed.
Visible crew/equipment: Just before James Bond throws Tee Hee out the train window, look carefully at the glass and you will see the reflection of a crew member watching the action. (01:54:35)
Continuity mistake: When Bond and Kanaga falls into the shark pool, they fall apart from each other. However, when we see them from under water, they are holding onto each other.
Revealing mistake: The snake held up to kill the agent and later Solitaire is obviously not a real snake but a fake one. Look at how stiff it looks.
Continuity mistake: During the chase scene when several men in boats are chasing Bond in a boat, one of the bad guys steals a black speedboat from the Sheriff's brother-in-law. The bottom of the black speedboat collects white scuff marks as the chase continues, but the scuffs increase and decrease erratically, indicating that the sequences were not shot in the order we see in the film.
Continuity mistake: After Bond is picked up by the taxi at the airport in New York, Whisper in the "white pimpmobile", as Felix Leiter puts it, shoots the taxi driver in the head. The car then swerves from the second-left lane on the road to the very left lane. But in the next shot of Bond's head you can see through the rear window that there is a car on the left side of the taxi, indicating that the car is still in the second-left lane. In the next shot the taxi is back in the very left lane.
Continuity mistake: After James lands with his hang glider on the island, he turns his jacket inside-out. There are no lapels. When he sits in Solitaire's chair, there are big lapels. (00:49:05)
Continuity mistake: On the beach, when Bond shows the card to Rosie, the way he holds it differs between shots: his fingers stand out or not, depending on the shot.
Visible crew/equipment: When Kananga and Bond are fighting a cable protrudes under Kananga's jacket, it even lifts up his clothes. Seemingly the mic cable. (01:54:27)
Continuity mistake: Before Bond and Solitaire are submerged with the sharks, the stuff on the operator's table changes positions between shots.
Suggested correction: It was a woollen carpet. Wool is fireproof.
It would still have been singed.
It does, as it turns brown.