Corrected entry: In the scene when the crew arrive on the "low" ship and the "high" Kryten is shot five times with a bazookoid, Lister drags him to safety behind a pile of boxes. However, he is not dragged far enough, so you can see the actor get up after he believes he is out of shot.
Corrected entry: After the first time the 'High' Kryten gets shot, he says 'Poor devil, his gun must have gone off accidentally', however, his lips don't move. (00:12:50)
Correction: Given the thickness of the latex mask that the actor is wearing, it is sometimes difficult to see if his lips are moving. Upon closer inspection however, Krytin is moving his jaw (its easier to tell that way).
Corrected entry: In 'White Hole', everything that happened, including the pool game, was erased from the crew's memories. So how does Lister remember "playing pool with planets" in 'Demons and Angels'?
Correction: Kryten only SAID that everything would be forgotten - obviously, the sanitation droid got it wrong.
I've often thought this is an error and your explanation is inadequate.
Correction: Because Kryten isn't dead (he walks back into shot seconds later), he doesn't need to be out of shot to stand up. It's therefore not a mistake.