Other mistake: Unfortunately the whole basis of the show is one big factual error. Throughout the series we see that Red Dwarf sustains damage from collisions, explosions, and so on. Most important of all, the rocket engine nozzle - surely made from the strongest materials available - has been punctured by some kind of impact. The systems require constant maintenance by humans (painting, repairs, etc), so skutters are not enough by themselves. So, we know that Red Dwarf is not made of some sort of fictional, indestructible materials, it is made of the kind of metals, plastics and other construction materials we build space shuttles and the like out of nowadays. So, after three thousand - never mind three million! - years the whole ship would be a clump of useless, corroded junk. The rubber and plastics in seals, electronic components and furniture would have crumbled to powder. The electronics themselves would have failed after a few hundred years at most. Metals in contact with liquids in pipes or reservoirs would have oxidized, and even the oxygen in the air would have been corrosive after that amount of time. Red Dwarf is not immune from the effects of long term decay and deterioration - if it were when Lister was released from stasis he would have found rooms full of relatively intact dead bodies instead of piles of crumbled dust. After three million years in space Red Dwarf would have been a pile of scrap, fatal to anyone going near it; subject to slow, subtle but constant radioactivity in space, after three million years it would be hotter than the inside of a working reactor.
Continuity mistake: When Lister crushes the high Rimmer's light bee, he puts his arm into Rimmer's chest. In the next shot, Lister's arm is gone. (00:21:35)

Continuity mistake: When the wax droids charge at the start of the battle, Santa, Marilyn Monroe and Pope Gregory charge forward, but in the next shot, Marilyn Monroe is running on her own. (00:22:35)
Continuity mistake: From the model shot of Blue Midget, Kryten is seen sitting on the right. When the camera cuts inside the ship, he is sitting on the left. (00:22:40)
Suggested correction: When the exterior shot of Blue Midget is shown, it is not very easy to tell the crew apart. They appear blurred, so it is impossible to determine who is sitting in which place.
Confidence and Paranoia - S1-E5
Continuity mistake: When Lister and Confidence go outside the ship, they do a little dance and both put their right feet forwards. In the next shot, their left feet are forward as they continue the dance. (00:25:30)
Gunmen of the Apocalypse - S6-E3
Revealing mistake: When the crew are trying to figure out how to save Kryten before going into the game, the Cat says 'if not, why not?' You can see Lister mouth the line. (00:15:25)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Lister leaves the saloon, his gloves appear on his hands between shots as he goes outside. (00:21:45)

Gunmen of the Apocalypse - S6-E3
Visible crew/equipment: Just after the simulant beams aboard and Lister and the Cat sit up from the table, a boom mic can be seen at the top of the screen. (00:07:40)
Visible crew/equipment: At The End of the episode, when Kryten explains why the Cat would kill himself, a boom mic shadow can be seen moving across his face,. (00:24:55)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When the Apocalypse boys shoot the bottle out of Kryten's hand, you can see Kryten drop the bottle neck. In the next shot he is still holding it. (00:14:45)
Gunmen of the Apocalypse - S6-E3
Revealing mistake: When Rimmer throws a cowboy over the bar, it wobbles. (00:21:35)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When the Cat realises he has lost his special skills, Lister is looking straight forwards. In the next shot he is looking down at the ground. (00:24:50)
Revealing mistake: During the car chase, the box Rimmer is sitting on keeps moving. (00:21:25)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Jimmy does his trick with the whip, it knocks Kryten's hat to the floor. In the next shot it is lying on the bar. (00:20:00)

Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Lister says the escape pod is not an option, his hands are apart in front of him. In the next shot, they are together. (00:12:20)
Gunmen of the Apocalypse - S6-E3
Visible crew/equipment: After Rimmer is sick, as Lister comes to his rescue, a boom mic shadow can be seen on the wall behind them near the horns. (00:18:50)
Visible crew/equipment: When Holly says she is broadcasting on a higher frequency, when the crew are about to commit suicide, a boom mic can be seen in the top left of the screen. (00:23:30)