Revealing mistake: Near the end of the film when Charlotte and her mother are having the row, Charlotte receives a huge slap. Play the slap in slow motion, and you can see that the mother misses Charlotte's face.
Other mistake: Near the end of the film, Charlotte and her mother (Mrs. Flax) are having a blazing row. Mrs Flax calls Charlotte 'the town tramp', and Charlotte retaliates by telling her that the town already has one. This results in Charlotte receiving a huge slap. This slap would leave her cheek as red as a tomato, but as the scene continues, there isn't a mark on her face. A tad unrealistic?.