Corrected entry: At the beginning of the TMA-1 excavation scene, studio lights can be seen reflecting off the tops of the astronauts' helmets (note the position of the sun low on the horizon versus the camera's perspective).
Corrected entry: Dave Bowman parks the pod next to the emergency airlock and blows the door off by detonating the explosive bolts. Since the pod was full of air, the door ought to have been ejected into the airlock and become a rather hazardous projectile. But in the scene it's nowhere to be found. What became of it?
Corrected entry: Dave exited the ship for an EVA to replace the 'flawed' AE35 unit. Unfortunately, Dave would've received five times the lethal dose of radiation during that brief jaunt. This is typical when in that proximity to Jupiter. Even though Dr. Floyd says "they can't be exposed to that radiation for any longer than four minutes", they'd still die from it within a few weeks of that brief exposure.
Corrected entry: 2001 is the only space-based film that correctly portrays 'space' as a soundless vacuum. No whooshes, no THX explosions...
Corrected entry: When David Bowman is travelling through the space portal, many streaks of light can be seen passing him on both sides yet when we see David Bowman himself, the streaks are reflected in his helmet and they don't seem to be moving at all.
Corrected entry: In the scene where Bowman is attempting to force entry into the Discovery by using the pod's robotic arm to manually open the exterior door, the error is that the force needed to turn the door opener in a weightless environment should have twisted the pod in the opposite direction as it wasn't physically locked to the mother ship anywhere else by the other arm.
Corrected entry: When they try to hide from HAL, Dave comments that there is a malfunction in the "C" pod. HAL should protest because it doesn’t detect anything wrong, but it doesn’t say anything.
Corrected entry: When Bowman leaves Discovery to retrieve the AE-35 Unit, he asks HAL to prepare the "B Pod" and HAL powers up and rotates the middle of three pods. Later, when Bowman asks Poole to help him with a problematic transmitter in "C-pod", they go to the pod bay and enter the middle pod which must still be B-pod as no two pods have left the ship and returned to shuffle their positions. (01:12:30 - 01:22:40)
Corrected entry: When Frank Poole and HAL are playing chess, HAL states his move as (in what is called "Descriptive Notation") "Queen to Bishop Three". This is not true, the move he makes is "Queen to Bishop Six".
Corrected entry: When Dave goes to retrieve lifeless Frank the computer screen to his right which is supposed to show continuously updated data, twice displays a jagged line like those found near the end of a reel of a motion picture film.
Corrected entry: Early in this chapter of the film, we see Discovery has three EVA Pods (from HAL's view, left to right they are C-pod, B-pod and A-pod). When Poole is killed, we see he was using the center pod. Bowman then goes after Poole with A-pod. This leaves behind the C-pod. Bowman gets back aboard Discovery by blowing explosive bolts to release his pod's door. After Bowman deactivates HAL, we can presume he recovers the now-damaged A-pod he ejected from. It can only be placed in either the right or center pod locations, and as we learn in 2010, it is found sitting in its original right-side location. So to leave Discovery for the last time, Bowman must use the C-pod which is on the left, yet is shown emerging from the center doorway B-pod originally launched from. (01:32:50 - 01:59:45)
Corrected entry: Towards the end of the movie where there are deep space shots of the planets, the spaceship and the sun, there is one shot where the sun is in the middle of several planetary objects. The objects closer to the viewer show crescent as they should due to the suns orientation to the planetary objects. On the far side of the sun however, the planetary objects also show crescent but shouldn't. They should show FULL or nearly full.
Corrected entry: If you take the letters in the computer's name (HAL), and then the next letter in the alphabet after each one, you get IBM. Stanley Kubrick denied it was on purpose but it is still kind of neat.
Corrected entry: On Discovery, artificial gravity is created by a spinning centrifuge. This is fine, but crew members are shown climbing a ladder into the center, where they are weightless. In reality, they would experience a quite large force perpendicular to the ladder. This is because they still have momentum from traveling with the floor of the centrifuge, but the speed of the higher steps is lower, and the speed in the center is zero.