Kiss 'N Tell - S1-E4
Continuity mistake: Zelda brings her horse to a stop and then reaches for an apple to throw at the dragon. When doing so, it cuts to a close up of her on the horse, and suddenly, a tassel appears on the horse's butt where the strap is, a blue triangle appears on the buckle of the same strap, an extra layer of blue appears under Zelda's saddle, and her belt buckle suddenly appears. (00:01:20)