Continuity mistake: Angelica has flowers on her dress. During the wedding, they disappear and reappear between shots.
Continuity mistake: The shape, amount, length and width of the white down "Dream Alliance's" face varied, as did the height of his white "boots", indicating that the same foal/horse was not used throughout the movie. The white on the foal's and adult Dream Alliance's face and lower legs looked painted on at times. Before Dream's first race, black tape was used on his lower legs, apparently as an attempt to make a different horse's higher white boots less or not at all noticeable. (00:32:42 - 00:35:51)