In Nirvana Crane's sleeping quarters, she ties up her dressing gown while sitting on the bed. When she stands up in the next shot the dressing gown is open.
After Kryten tells Rimmer he doesn't have the sort of brain that can accept an implant, Rimmer cries "No!" and paces across the sleeping quarters, then suddenly Kryten is facing the opposite direction and Rimmer is standing next to the bunks in the opposite end of the room to where he was going.
Rimmer managed to get back on board while the rest of the crew are interviewing for his replacement, although in the past they said that the ship can handle one hologram. there has been times in the other episodes where they can have more than one hologram (eg in ME2, Angel and Demons, Stoke me a clipper etc).