Factual error: During the war games they have Jefferson pose as a major in order to facilitate the commandeering of the ambulance and the jeep. Regardless of their personal feelings in the matter the ambulance crew and the driver and troops in the jeep would be perfectly aware that no black man would ever be promoted to a position of authority in an otherwise all white command. We may find it repugnant today but the US Army was rigidly segregated during World War 2 - and it stayed that way until 1948. Jefferson may have been inducted into a special unit like the Dirty Dozen but considering that the future of the entire mission is riding on their success at the games, throwing it all away like that makes no sense at all.
Plot hole: Blofeld tells the bad guys that they had Bond and let him get away. The woman says, "But Bond is dead. It was in all the papers." As we saw in a paper near the start, there was a well-publicised photo of Bond, and when she met him he wasn't using any kind of disguise, so how did she not recognise him if she'd seen the papers?
Continuity mistake: In the scene where Coco tears up the photo of Luke with the women, he tears it carelessly, starting with the upper left corner. The end shot of the movie shows the same photo, reassembled, showing a neat, cross-wise tear, with the center of the tear directly over Luke's heart.
Factual error: When M and his entourage arrive at Bond's estate, their cars are surrounded by sheep. They then drive on down an unsurfaced road to Bond's house, past a pride of lions he keeps on the grounds. A series of sweeping overhead shots shows us that it is all one huge field, with no fences or the like. Those sheep aren't going to last very long.
Continuity mistake: Mrs. Robinson picks up the phone to call the police on Benjamin who has broken into her house but if you look closely she never dials the phone. (01:35:10)
Suggested correction: Since we never see the police come in, we're not for sure she actually called them as Mrs. Robinson is known to lie and manipulate. All we hear are tires screeching and as we see no police pursuing him, it's unlikely.
Continuity mistake: In the wide angle shot of Chief Gillespie approaching Virgil Tibbs at the train station, there is a dog on the platform, in between Gillepsie and Tibbs. In the next shot, a closer view of Gillespie approaching Tibbs, the dog is gone.
Plot hole: Towards the end of the film when Newman and the remaining stagecoach people are in the cabin at the top of the hill, Richard Boone's character sends one of his two henchman (the Anglo, not the Mexican) around to the back of the cabin to apparently surprise them from behind. Then Newman's character walks down the hill and Boone and the Mexican henchman are all killed in a shootout. Everyone comes out of the cabin, comes down the hill and the credits roll. I guess that now, almost 40 years later, that poor Anglo-henchman is still behind the cabin, waiting for them to come out.
Continuity mistake: The scene where Col. Hathi inspects his troops, he leans on his stick and it breaks. However, in the next scenes, the stick you see is sometimes broken and sometimes it is still complete.
Continuity mistake: In the park scene where Paul's drunk and barefoot, Corie carries his shoes as she follows him back to their apartment. When they're in the apartment Paul has his shoes on, and Corie helps him take his wet shoes off.
Other mistake: Bandoleer rounds don't fit any weapon in the show. When Pierce tries the Gatling gun, there is no magazine in it.
Revealing mistake: When the farmer is going to shoot the sign the bank put up, you can very well see the mark where the hole is going to appear.
Visible crew/equipment: As Quatermass drives back to the spaceship in a cab, just before it is to be drilled, the film crew can be easily seen in the cab's windows. A woman with a white cap can be seen holding a script. Later when the police use a megaphone on their car to announce the spaceship is a hoax, you can again see the same woman with a white cap in one of the windows of the police car.
Suggested correction: How could you tell if the reflection showed the actual film crew and not just a TV and newsreel crew assembled for the scene? They were also using mounted cameras and carrying papers.
Continuity mistake: Jim Dale and Anita Harris think that Barbara Windsor is going to jump off the roof and race across the road into the nurse's block. We see Anita Harris is wearing dark seamed hosiery as she runs up the stairs. A few minutes later she hangs down from the roof and the seams have disappeared from the backs of her legs. (00:59:00 - 01:01:55)
Revealing mistake: In the scene where King Arthur expounds on the joy of his kingdom, he has a Band-Aid on the back of his neck. (00:21:00)
Continuity mistake: There's a scene where Audrey Hepburn's husband Sam is leaving their apartment. Standing on the pavement outside he hails a cab, which pulls up through a (quite sizeable) puddle, splashing him with water. Opposite him on the other side of the road are parked two cars and the villains' Volkswagen van. There's a quick cut-away exchange of "pleasantries" between Sam and the cabby before it drives off. The next shot has the villain (Richard Crenna) emerging from the van, crossing the street, and making for the door to their apartment, only all of a sudden the puddle has disappeared, as have the two cars which were parked behind the Volkswagen van.
Revealing mistake: At the end when the class are having their dance, the band manage to play without any amps, speakers or mikes. We even hear keyboards, despite no-one playing any.
Visible crew/equipment: After Lucifer talks to God and doesn't know what is happening and Saint Peter comes to escort him out they get into a discussion why he failed the entrance examination, you can see a reflection in glass between the camera and Lucifer and a man who does not appear to be St. Peter. (Maybe director Stanley Donen?) (01:39:25)
Other mistake: After the "fat fat fatty" scene, Franz shoots his way in, starting with three bullets into the door lock. Over the next scene he fires about twelve shots, despite the fact he's firing an 8-shot Luger.
Continuity mistake: Millie's beads have a mind of their own. They do not stay in place even when she is standing still. Besides the funny scene during the title credits (when it is deliberate), and when Miss Dorothy registers, they also move during a scene when Millie displays her thoughts on Miss Dorothy's beads when the two of them go into the elevator for the first time.
Continuity mistake: In the scene in the bullring, Fathom is knocked down by a pursuing bull. We see black underwear under her dress after she falls down. She gets knocked down a second time shortly after and this time it has changed to white.