Continuity mistake: When the movie begins and everyone comes to see Aurora, the ornaments carved on the side of her cradle change between shots: first it's triangles; then the boy arrives and it's leaves; and when the fairies approach there are none. Later on the leaves reappear.
Continuity mistake: When Merryweather makes the dress blue a second time, it starts off on a ribbon that wraps itself around the dress waistline. The ribbon doesn't make it onto the completed dress.
Suggested correction: Hardly a mistake, since they're using magic and the dress changes multiple times.
Continuity mistake: When the fairies are reading a book to see how to make a dress, Flora's hand swaps from being lowered to on top of the page, between shots.