Plot hole: Stromberg One is on 48 degrees West, Stromberg Two is at 22 degrees West, and the Liparus further east. That means that Stromberg Two has sailed at least 28 degrees since its departure from the Liparus. That is more than 2.500 km and would take a submarine several days. How did it get that far in a few hours?
Continuity mistake: At the end of the film we see the large tanker ship exploding at many different areas of its hull including a lot of explosions on the topside. However, there is a point where the camera shows the ship sinking with an underwater shot, sinking with bow first and then progressing towards the stern and there are no holes let alone burn marks that would show where the explosions took place.
Revealing mistake: As Bond and the major are hurtling toward the surface in the "escape chamber" toward the end of the movie, you can see inside the window. The little toy escape chamber is about two thirds full of splashing water right in the area where they are supposed to be.
Revealing mistake: As Bond enters the night club in Egypt, the camera pans right to reveal two extras who appear to be waiting for their cue to start walking, but obviously miss this cue as they don't actually start walking until the camera is on them. (00:32:48)
Other mistake: When Bond shoots Stromberg down the barrel of the undertable spear gun, his PPK visibly suffers from a stovepipe jam (the blank round becoming stuck in the ejection port) twice, possibly due to a repeat shot. However Bond is then seen firing several more shots into Stromberg without clearing the jam.
Plot hole: If they assembled the wet bike on the submarine, they wouldn't be able to get it off as it would be too big to fit through the hatch.
Factual error: When the two missiles blast out of the water, the first thing you see is the glare of the rocket motors under water. SLBMs rise out of the water solely on the air or steam pressure impulse that propels them out of the launcher. The rocket motors ignite only after the missile has left the water completely. (01:43:20)
Continuity mistake: When Stromberg raises his 'house' from the sea, in the first shot where the paintings slide up, you can see the water's surface in the top of the window. But in the next clip, exterior shot, the house is still fully submerged. And based on the size of the house and the location of Stromberg's living room, his windows must have been 10-20 meters below the surface in the first situation.
Plot hole: Right before Bond hops on the moving camera globe to go blow up the barrier to the control room on the Liparus, they show a shot of one of the firing slots on the control room open and the guards firing at Bond. Through the port, you can see that Bond is on the catwalk above the walkway to the barrier. But when Bond climbs down onto the camera globe, and when he's sliding back on the track, nobody fires a shot, even though he's now in a direct line of fire with those firing ports and the guards have a totally clear shot at him.