Deliberate mistake: When 11 is dropped into the water and eaten by the piranhas, although the ravenous fish probably ate most of her and what was on her, there should at least be pieces of clothing that would rise to the surface in the flurry of activity. Not to mention that even though the water is a murky green all the blood from her body should have created a temporary, but very noticeable darkening of the water.
Plot hole: Other than a reason to advance the the plot the Americans have no reason to launch their second rocket. If they're prepared to go to war because they think the Russians will steal another rocket then don't launch the rocket. It's not like there is an urgency to get another rocket into space so as far as the Americans are concerned what is the hurry?
Factual error: When Bond enters the Sumo game, the writing above the door reads, "Beauty Parlour" in Japanese.
Continuity mistake: The stranger who is watching Bond's funeral through binoculars lowers the binoculars after Bond is thrown into the water - as if looking down on the water. But the binocular is so low he's actually looking into the table.
Plot hole: If a fake burial at sea and a picture in the newspaper was enough to convince Bond's enemies that he was dead, was it really necessary to have him shot at in the bed at the beginning? We learn later that the girl he was with was part of the fake death (and probably the gunmen too) so couldn't Bond's people have just started with the newspaper and burial at sea to begin with rather than risking his life in the process?
Revealing mistake: When the helicopter with the magnet drops the villains' car into the ocean, look carefully and you can see that the car is empty.
Continuity mistake: When Bond and Kissy reaches the crater's edge it is bright daylight and the sun is quite high up (that can be seen from the shadows on Bond's shirt). But when the reach the bottom of the crater it is night.
Other mistake: When Blofeld blows up the crater at the end we see a shot of lava coming out of the top of the crater, but then we see a shot of the inside of the crater with all the bodies and barrels there is no lava. So where is the lava at the top of the crater coming from?
Continuity mistake: During the fight scene in Osato's office with the large goon, the villain's suit and shirt become disheveled and un-tucked, then straightened and tucked, several times as the shots change.
Factual error: When the Russians launch their ship, they are talking about Sputnik. In Russian, the technician says that it is 36 degrees while the English subtitle reads 72 degrees, which is not accurate. 36°C is 96.8°F.
Continuity mistake: When Bond's body is lowered down the ladder into the submarine it is glistening wet, but in the next clip when they start cutting it open, it is almost dry - and definitely not glistening anymore.
Revealing mistake: When Tanaka's train starts moving neither Bond, Tanaka nor the girl is seen to feel the acceleration. They stand/walk perfectly steady. That is impossible in an accelerating train. It is clear that it's only the lights moving on the wall.
Continuity mistake: When the poison hits Aki's lips the killer must have been holding the bottle and string steady. But in the next shot he is seen crawling backwards using both hands and neither bottle nor string is anywhere to be seen. Later the bottle is in his pocket.
Continuity mistake: When Bond crawls down the side of the crater he crawls next to a pipe running down the wall. But in the next shot the pipe is gone.
Audio problem: When Bond is escaping from Osato Chemicals for the first time, the security guards that are shooting at him inside the building are using silenced revolvers, yet when they fire, the noise made is that of an unsilenced weapon.
Continuity mistake: Just before Bond is 'killed' the bed in which he lies flips up. That would make him flip/slide down into the lower end of the bed. But when the bed is pulled down again Bond lies perfectly stretched out like nothing happened.
Continuity mistake: The first Japanese spy woman opens her purse and speaks into it. The opening is no more than 8-10 cm wide. But in the next clip when we see a close-up of the purse it is opened very wide - more than 20 cm.
Plot hole: In order to stop the Spectre spacecraft, Bond dresses up as a Spectre astronaut and tries to sneak on board. But why didn't he just waylay all 3 Spectre astronauts, which would have scuttled the mission? Instead he just waylays 1 which allows the mission to continue.
Continuity mistake: When Bond and the Japanese girl arrives at Henderson's home, and a girl comes to welcome them, we can see that the car is parked on the opposite side before the previous shot.