Continuity mistake: At the time Damien appears in the lounge with a baseball cap on, asking Rodney if he wants to play war, the shot shows him with his cap slanted to the left, next shot it's to the right and finally it ends up being straight on his head. (He was obviously quite fidgety behind the scenes).
Modern Men - S8-E2
Continuity mistake: While Del and Rodney are arguing over the Trotter Crash Turban, the end of the scarf attached to the helmet keeps changing position. In one shot it is behind Rodney's back, then in front of his chest, and then behind his back again.
Continuity mistake: When Del and Rodney are outside Sotheby's, it is dry. When the van is rocking, it is pouring down.
Continuity mistake: When Del is pretending to be ill, Albert and Raquel say that they called the doctor in the previous evening. However, a few shots earlier we learn that Del was out with Rodney the night before.
Continuity mistake: The 3 wheel van has a breakdown and pulls up onto a pavement outside a sport shop. Del and Rodney investigate the problem. A few minutes later there is a wideshot of the vehicle, showing it's in the middle of the road, nowhere near a sport shop. (00:39:30 - 00:42:50)
Chosen answer: An apparent long string of illnesses.