When Fry goes into the chemical shower the lights are in order with green on top and red on bottom; but when Bender comes back to Planet Express later on the positions have changed.
In the first snatch of "All my circuits", Calculon screws a "nutring" on Monique's forefinger. On the next frame, however, the ring is on her middle finger.
When the Planet Express Crew moves the couch out of the house, Hermes says, "We'll bill you for the couch" but his lips don't move.