Other mistake: When the gang walks out of the school and Spinelli says, "I can't believe Gus didn't even show up for school today," Gretchen's dress is incorrectly coloured green. Two shots later, it is blue again, as it should be.
Other mistake: When Mikey enters the dance class and Spinelli says, "Mikey?", the letters on the door to Mademoiselle's office are mirrored; the background is flipped in this shot.
