Continuity mistake: Right in the beginning when Clara is giving a gift to her neighbor, Mrs. Miller, it shows her from behind wearing a pink coat with a hood on it, and there is a tan line that outlines the collar of the coat. It switches to the next shot from in front of her face and suddenly her coat is more an off orange pink color, and the line around it turns to a bright orangish yellow, and becomes thinner.
Continuity mistake: In the beginning, Fritz runs on the sidewalk next to some buildings over some ice, and jumps to slide along having fun, Clara following shortly after. In the first shot of him on the ice, he has not shadow or reflection in the ice he is standing on when shot from in front. But when it cuts to the next shot from the side of him sliding by, he suddenly has his reflection or shadow in the ice under him, and so does Clara as she slides by.