The suspenders of Amy's firefighter outfit are up when the crew confronts Bender over the fires but they are down when the camera focuses on Farnsworth, who is seated at Amy's waist level and they are back up again in the next scene.
When the crew are looking at the map of fires, Hermes' and Zoidberg's suspenders are alternately up and down.
When the Planet Express crew is sleeping, their bunks are shown with each of their last names written on their own bunks. When it shows Turanga Leela's bunk, it says "Leela", even though it has been previously established that "Turanga" is her family name and therefore should have been written.