Dave Lister, in reminiscing about times with Arnold Rimmer, mentions a time just after Dave awoke when they went through the lockers of the dead crew. However, at the time Rimmer was wearing the blue tunic that he wore when he received the hard light drive, which took place many years later. He should be wearing the khaki Red Dwarf uniform he wore at the start of the show.
The left-hand rod that controls the arm movement on the left-most Rimmer puppet is clearly visible.
Kochanski refers to the "German translation" of Papageno's first aria "Die Zauberflöte", even though it was originally in German.