Revealing mistake: When Del sees Denzil skating along and tells him that he's got his money (the butterfly), Denzil gives him a high five and crushes the butterfly. If you look at Del's hand when Denzil goes past him, you can see the butterfly is not crushed at all.
Revealing mistake: When towing the car, the tow rope is slack, showing the van is not towing the other car. (00:05:45)
Watching the Girls Go By - S4-E6
Revealing mistake: At the start, Mickey Pearce is playing darts in the pub by Boycie. On the 3rd dart, he actually aims for the floor behind Boycie to make it seem like the dart bounced off the board. (00:01:10)
Revealing mistake: When Rodney is asking Del if he thinks the bathroom is haunted, you can see stage lights in his spoon. (00:10:20)
Revealing mistake: In the opening scene, there is no light switch in the Trotter's flat.
Revealing mistake: When Albert is coming through the crowd of people that Del is talking to, to go and look out, look at the extra just to the right of Albert. He forgets he should be in role and stares straight at the camera for the whole time.
Yuppy Love - S6-E1
Revealing mistake: Just after Cassandra gives Rodney his coat back, she leaves the building. As she does, you can just see Rodney in the reflection in the door. He's waiting for his cue to come out of the building.
Revealing mistake: When Del is grabbing the snooker cue off the crazy man, you can see Del stick his thumb up for the other actor to hold during the snooker cue joke. (00:28:35)
Revealing mistake: As Del Boy is talking to Rodney and preparing his bacon sandwich a lingering shadow can be seen, being cast against the kitchen door. This shadow belongs to Uncle Albert, who is waiting for his cue to walk into the kitchen with Weetabix on his face. (00:10:55)
The Long Legs of the Law - S2-E1
Revealing mistake: When Del drops all the cutlery, if you watch you can see David Jason is holding it in his hands ready to drop. (00:07:50)
Revealing mistake: In the bar scene at the start, Del and Rodney are talking to Mike to try to get him to by a computer that doesn't work. The leaflet that Del reads off, is completely blank.
Revealing mistake: When Albert says to Rodney about his date, "Where are you taking her? Scrumping?" As he says that line, look at Del. He mouths them by accident. (00:26:40)
Revealing mistake: When Rodney is holding Damien, it shows a shot of it in the mirror, the next shot is from behind the mirror and he is holding him the different way round.
Suggested correction: This was during his dream, so probably plausible in those circumstances.
Chain Gang - S6-E3
Revealing mistake: When Arnie's car flashes its headlights to Del, it is obvious that the person sat in the car is not the actor playing Arnie in the rest of the episode. (00:13:25)
Revealing mistake: When Slater asks if the baby will be named after him and Rodney gives his answer, camera shows Del and you can quite see David Jason doing his best not to burst into laughter because of Rodney's answer.
Suggested correction: After Rodney gives his answer, the camera cuts to Slater, and then back to Del. He isn't close to bursting into laughter. He only laughs when he and Rodney stare at each other after Slater has left the pub, which was certainly the original intention.
Danger UXD - S6-E2
Revealing mistake: When the dolls explode in the flat, you can tell they are being held by a member of the crew by the way they move. (00:26:30)
The Unlucky Winner Is... - S6-E4
Revealing mistake: After Rodney berates Del whilst he's in the bathroom of the hotel room he and Cassandra go out to the balcony and Cassandra goes to get him a drink, Del then goes out to join him. Whilst they're talking you can see Cassandra in the reflection of the balcony door waiting for her cue to come in to give Rodney his drink.