Junior's given a wandering mole in a couple of the opener's shots.
Ron's perpetual cowlick poofs out between shots, from a few thin hairs to a massive tuft, as Kim leaves him and his Animology book to head for practice.
Cleanup Goof: Just before the above, a stray line appears beside Ron's nose (presumably mistaken for a nostril).
The pony-tailed cheerleader is also on the bleachers near the episode's beginning -- but as a redhead, this time.
The cheerleader sitting behind Bonnie on the bleachers has black hair in the wide shot, and blonde when we cut in closer.
Is Phillipe Bullion's monogrammed medallion on a chain, or pinned to his clavicle? If that line beneath his ample chin is meant to be a chain (rather than simply a neck crease), it detaches several times, leaving the gold piece floating on Phillipe's upper chest.