Factual error: When Bird 1 is launched, both in the cave and outside, the exhaust plume and smoke trail is pitifully small compared to the plume of a real rocket.
Revealing mistake: At the beginning of the film during Bond's "funeral", the shot cuts to a man watching the funeral from a boat through a pair of binoculars. The camera then moves to the newspaper next to him showing an "article" reporting Bond's murder. If you look closely at the "article" itself, you can see it was actually pasted onto the actual local newspaper. They probably bought a local newspaper and pasted the fake article over it to make it look authentic.
Continuity mistake: During the car chase sequence, the radio antenna of the black sedan disappears and reappears between shots. It is most noticeable when the sedan is being lifted off. In the close-up as the magnet is attached to the car's roof, the antenna is visible. In the shots in which the car is shown from above, the antenna has completely disappeared. (00:41:00)
Revealing mistake: Upon capturing the Soviet spacecraft, SPECTRE's spacecraft does some attitude maneuvering with small rockets on the side of the hull. The rockets fire visible exhaust from screen-left to screen-right, but flecks of the stuff slow to a halt and accelerate backwards, right to left, exactly as if the spaceship model were standing upright with the camera tilted sideways, which is exactly what was done.
Other mistake: Early in the movie, in the shot of the police vehicle screeching to a halt in front of the hotel Bond is staying at you can see a crowd of people huddled together on the sidewalk with a policeman making sure they stay put. (The producers had to order the area in front of the hotel closed off to civilians as a precaution as so no one would get hurt or get in the way of the filming). (00:05:35)
Factual error: In the beginning scene involving the U.S. spacecraft, as the front door on the unidentified ship starts to close around the U.S. capsule you can see the reflection of red light across the hull of the captor's ship. Where is this light coming from? It can't be from the sun, because sunlight only appears white to our eyes. (00:03:10)
Continuity mistake: In the scene where Bond is at the Sumo wrestling arena, when he is being escorted to his seat, the ref overseeing the fighting ring is wearing a red robe, but right after Bond takes his seat, the ref's robe turns to a light green color and stays that way for the rest of the scene. (00:16:45 - 00:19:15)
Continuity mistake: When Bond finally meets Blofeld, there are shots on Bond and others on Blofeld. Blofeld's cat is seen in all of this, at times looking at Bond and then in the next shot looking at Blofeld. Quick reflexes those cats.
Continuity mistake: When Blofeld is in the volcano control room, and the scene keeps changing from him to the main crater, the position of the cat in his arms is never the same twice. Sometimes both paws are in, sometimes both out, sometimes one of each etc.
Continuity mistake: When Bond and Kissy are on the slopes of the volcano near the end of the film, they watch a hellicopter fly overhead and go down inside. It lands on a helipad. In the next shot from above (when the massive door is closing) the helipad is empty.