When Zap, Fry, and Bender are carrying pillows they are on a grassy hill, however, when it begins to rain the terrain appears to change to desert with outcroppings of rock.
During the trial of Brannigan the Hyper-Chicken's beak is clearly an orange-like color and different from the rest of his body which is a turquoise color. However, this changes in the next couple of hearings where the beak has the same color as the body and looks much less like a beak.
The old DOOP Headquarters are captioned as "Weehauken" in New Jersey, but it should be spelled "Weehawken".