Factual error: Cher complains that Astroturf is going to ruin baseball. Mermaids is set in 1963 when Astroturf was still being developed under the name Chemigrass. It wasn't christened Astroturf until it made its world debut on the floor of the Houston Astrodome in 1966.
Revealing mistake: Toward the end when Charlotte and Joe are about to make love, it shows him lifting the hem of her black slip. But in the next cut they are kissing again with her slip still on.
Continuity mistake: 35 minutes into the film, Cher enters her bedroom with a bowl in her right hand and a bottle in the left. When she gets into bed, both have switched hands.
Continuity mistake: In the scene where Cher is giving out tubes of toothpaste to the kids for Halloween, the bowl is almost emptied by the costumed kids and in the next scene the bowl is full again.
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?.
Audio problem: Three quarters into the movie, the girls have some wine, and little Kate overindulges. In the next take we hear belching and hiccups that don't match the girls sitting quietly on the porch swing, talking.
Continuity mistake: At the end when Cher and the girls are setting the table, Charlotte brings a big bowl of cheetos to the table - must have been handed it by a crew member because there's no big bowl in sight before she puts it on the table.
