Continuity: When Fry first takes the tangled Christmas lights out of the fake box, they are all red and blue. However, when the shot cuts outward to get a wider view, many of the lights have turned green.

Continuity: In the very beginning scene, where Fry and Leela are talking, there is an explosion. When some ceiling falls down there is one big bit and three small bits next to Leela's foot but then a few seconds later there is one big bit and a few small bits all in different places.

Continuity: Just as Hermes A is about to shoot the box into the sun, all the crew (A and B) shoot out into the airlock. However, Hermes B doesn't come out of the box and just appears in the pile. This is confirmed in the commentary.

Continuity: When Leela looks in the box, the wall behind her is red, then blue when it cuts back, then red again, and finally blue as she enters the other universe.