Revealing mistake: When the fashion club is looking at clothes in the store, Quinn and Stacy are looking in the mirror and their reflections properly show. When a slightly further angle is shown including Sandy (who stands right next to Quinn), Sandy's reflection does not show in the mirror at all (even though she's standing right by it). Also, no reflections are shown of any scenery in the store or the other two girls (who are within reflection range) - again, just Quinn and Stacy are reflected.
Continuity mistake: When Daria first hops in the van, she bangs the top of her head on the wall of the door getting in, but later, when the bruise is shown from the incident, it is now on her lower forehead (just above her eyes). The bruise would have been much higher up according to where she first hit her head.
Audio problem: When Trent is playing the guitar for Daria outside, he plays a "G" chord several times. Right after telling her it's a "G" chord, he plays it again, then switches his hand on the strings to a completely different area and strums (which should play a whole different sounding chord), but we still hear the same "G" as if he didn't move his hand on the strings at all.
