When Tom and Barbara are having breakfast after a sleepless night, Tom spoons sugar into his tea. However in the reverse shot from Barbara's viewpoint, he is not doing this and instead his attention focused on Barbara.
After Tom shows off the potato planter Barbara states that because the eyes are not facing upwards the potatoes wont grow properly this is incorrect it makes no difference which way up the potatoes are planted, the shoots will always grow towards the surface.
Despite the Ledbetters complaining about it being 6 in the morning, we can easily see the sun is directly overhead.
At the beginning, when the Leadbetters put cotton wool in their ears, the wad that Margo puts into her right ear falls out onto the pillow.