After Bond and Solitaire go underground via the grave, the guards they avoid can be heard to be running on a manufactured floor (perhaps tiled or vinyl). There is no floor in the cave at that point, just rough rock.
In the opening scene, a British agent supposedly gets killed by a snake. The snake is a Boa Canin constrictor which has neither fangs nor venom, and never actually bites him. In fact, the man appears to be alive and still breathing as the opening credits roll out. Perhaps the agent was killed later on in a different way, unseen by us, or he died of fright.
When making the coffee for M, Bond puts the milk in the coffee and then puts the steam into the coffee, demonstrating that neither he nor anyone involved in the scene had the faintest idea how to use the machine.
Bond claims the magnetic watch will "deflect bullets," though bullets are generally copper over lead, and thus nonmagnetic. It's doubtful that any magnetic field would deflect a steel jacketed or steel cored armor piercing military bullet.
When Quarrel Junior takes Rosie's revolver from her on the boat, he tells her, "You might have even killed me if you took off the safety catch". Revolvers have no safety catch, only a semi-automatic pistol like Bond's Walther PPK would have one.
After Whisper shoots Bond's driver with the side-view mirror dart, Bond takes the wheel from the back seat. We see and hear the rear-view mirror on Bond's car get broken off. In the next shot of the car head-on, after Bond swerves by the Blue Cadillac, the rear-view mirror is intact.
In the opening scene, the voodoo priest is carrying a green snake with the snake's mouth agape, and he is holding it about 15cm from the head when the scene is on the priest. However, on the close-ups of the man tied to the stake, the priest is holding the snake right behind the head, as one might do with a poisonous snake.
When Bond is en route to NY and his driver is killed the car swerves into the left lane. The next shot shows Bond telling the driver to "take it easy", but the scenery behind Bond (through back window of the car) still shows them as being in the center lane.
When Bond gives Mrs. Bell her "flying" lesson, the wings are torn off the plane. Yet when he asks her "Same time tomorrow?", the reaction shot of Mrs. Bell shows an intact left wing. It's the same 'reaction' shot as when he climbed into the plane.
When Bond fans out the tarot cards and tells Solitaire to pick one, the deck is perfectly fanned and there appear to be at least fifty cards in the deck, however as she takes a card, the deck in Bond's hand is now haphazardly arranged and there clearly aren't more than fifteen or twenty cards.
Sheriff Pepper commandeers a Louisiana State Patrol Chevrolet Impala with old-style cylindrical roof lights, at the scene where his own car is destroyed by a boat. But when he arrives at the State Police road-block, he and the Troopers who drive him arrive in an Impala with more contemporary roof-lights. One of the other cars already at the road-block when they arrive appears to be the car they supposedly used to drive to the roadblock.
When the real Baron Samedi rises up from underground, the snake handler is shown among the crowd of people witnessing the "vision". He had supposedly been killed by Bond before he shot at the robot Baron Samedi.
After Charlie is killed, nobody is driving the car that Bond is traveling in. Then, Bond tries to commandeer the car with the steering wheel. Just about every car he passes is a Chevrolet Impala, with the exception of two Cadillac Eldorados, the same model Eldorado as the one the killer was driving.
During the boat chase, the other boat is close behind Bond's, yet when Bond's boat is "hiding," the water is perfectly calm. In reality, there would have been no time for the wake from Bond's boat to dissipate.
Most of the Tarot cards used in the movie are from the deck "Tarot of the Witches," by Fergus Hall. (They also have "007" printed on the backs.) Yet the "Death" card held by Baron Samedi, and later found by Bond and Leiter, is from a different deck. Hall's "Death" card features a scythe-wielding, cape-clad skeleton standing against a red sky.
Kananga hits Solitaire across the face with such force that she falls to the ground. In the next scene when Solitaire is looking up there is no mark on her face, not even a red mark, and no bruise is present later.
When Bond and Solitaire are tied up on the winch, Kananga cuts Bond's arm with a knife. When Whisper starts the winch, a close-up of Bond's arm shows that the long angled cut starts much lower down than previously.
When Bond and Solitaire escape the island and return to New Orleans, at the airport they are driven off in a taxi. The taxi driver's hands are white but when the scene cuts to an internal shot, the driver is black.
During the car and plane chase around the airport one of the cars jumps and lands on the left wing of a DC3/C47 airplane. There is no damage to the wing but the next shot clearly shows that the plane has a lot of damage to roof of the cabin. In the 'jump' the car's undercarriage scraped/skidded across the top of the cabin, causing the damage. But it could very well be a prop which has been rescued from the Mojave Desert airplane graveyard (Davis-Monthan)
When Kananga shoots the couch Whisper is sitting on with the gas pellets, the couch begins to inflate. Whisper literally disappears completely off screen when the couch explodes, and then instantly re-appears a second afterward as if he never left the couch.
When the helicopter shoots at Bond and Solitaire about half way through the film, Bond grabs Solitaire and throws her onto the ground. The ground is covered in bark and leaves so that when the helicopter has passed and they stand up, you can see the front of Solitaire's blouse is covered in debris. In the immediate next shot, her blouse is completely clean.
Adam is shown speeding across the Louisiana state line on solid land which appears to be adjacent to a levee. This would suggest that the alligator farm is in Mississippi east of Louisiana. So in order to cross the state line, Adam would have had to cross a bridge.
In NY, James Bond travels from the airport to CIA address that Felix Leiter says is close to E 57th St. But he somehow travels on the Franklin D. Roosevelt Drive southbound all the way to the Battery Park when in reality driver would have taken Midtown tunnel instead, or would have traveled northbound on FDR from Brooklyn-Battery tunnel.
In order for Tee Hee to be able to break the gun, he would need to have quite a bit of strength in both his claw and his real hand equally, otherwise the gun would just slip out of his hand when he tried to bend it.
The only place in the world where alligators and crocodiles meet in the wild is in the Everglades of Florida, where salt and fresh water meet in estuaries. But Tee Hee's Louisiana crocodile farm is not in the wild, it is where captive crocodiles have been bred by humans.
When Mr. Big/Kananga has trapped Bond in the chair and is interrogating him, he wants to see if Solitaire has lost her powers. So he asks Tee-Hee to pass him Bond's Rolex Submariner watch, and apparently reads the registration number on its back. In fact, there are no numbers on the back of Rolex watches, for the serial number and model numbers are hidden between the watches lugs and can only be seen by removing the bracelet. However, what Mr. Big actually says is, "On the back of Mr. Bond's watch, I see the registration number: 3-2-6-6", and immediately asks, "Do I speak the truth"? Therefore, it is acceptable that Kananga could simply be bluffing, and since he can't see any number, he expected the answer to his question to be no, whether that was the real number or not.
Mr. Big shoots the couch with a shark gun pellet, causing it to inflate and explode. The couch is a big balloon, with no stuffing. Inflatable couches of that type were a fad available for purchase (for your 'mod' apartment) in the 1960s and 1970s.
Near the start of the film, Leiter's staff trace the white car to an address which is in a block containing the Oh Cult Voodoo Shop, yet they fail to recognize the fact that this is also the building that Kananga and his people have just entered.
When Bond is seated in his chair, two metal cuffs snap down on his wrists. However, the left cuff has failed to connect to the other side of the chair, as would be necessary to constrain Bond's left arm.
After Bond's cab driver gets killed, you can see him still driving the vehicle quite well after he is supposedly "dead" because you can clearly see him controlling the steering wheel and the gas pedal.
After Bond destroys the fake Baron Samedi and rescues Solitaire, a man rushes towards him with a machete. Bond shoots him twice. There are two errors. The man's shoulder is already covered in Blood before Bond shoots him, and also, the second shot Bond fires appears to not hit the man, yet the man goes flying backwards as if he is shot.
Bond manages to steer the car from danger by driving it onto a set of steps that lead to a building. It then crashes into a van. If you look carefully, the "dead" driver is steering the car, and Bond does not appear to even be in the car at all.
When Bond follows the limo out of the parking deck, he ends up on the street, all alone on the sidewalk. However, when he hails a cab in the following shot, all of a sudden spectators along the sidewalk are reflected in the side windows of the cab.
There are two funeral scenes in the film - one at the beginning and one in the middle, supposedly days apart. However the exact same passers-by are seen watching the procession pass by, and the exact-same mourners are all wearing the exact-same same clothing both times.
The goof items below may give away important plot points.
As Solitaire is lying in bed on the train, a quick cut to a close-up shows Tee-Hee using his mechanical claw hand to short out an electrical box; a quick cut back to Solitaire shows the lights go off in the train berth that she and Bond occupy and the room is now quite dark. Seconds later, however, when Bond exits the bathroom and sees Tee-Hee (and during the ensuing fight), the room is now brightly lit again - the electric lights can even be seen burning brightly in the bathroom in several shots.
In the train scene near the end of the film, Bond exits the bathroom to approach the berth where Solitaire is lying and is surprised by Tee-Hee standing behind him. Before Bond strikes the first blow to push Tee-Hee backwards into the wall, the hole he would create is already in the wall behind him.
Kananga swallows the gas pellet, which is made of metal, and has compressed gas inside. In order for the compressed gas from the pellet to escape into Kananga's body, he would either have to digest the metal casing, or trigger the round somehow. Digestion would take considerable time, so we can assume that his swallowing of the round set it off. Then again, his digestive tract wouldn't hold the gas in, he would just let out one horrific 'belch'.
Although the set piece where Bond tails Kananga's car from the voodoo shop in a taxi is an iconic movie moment, it actually makes no sense on two levels. Firstly, the men tailing him establish at the outset that "he's tailing", so they know that Bond is going wherever Kananga does. Secondly, Bond's taxi driver is one of Mr. Big's men - so also knows the destination. What is the point in having all of the other cars involved if everyone already knows where Bond is going, outside of the plot twist of disguising the fact that one of the tails is actually Felix's man?