At the start of the film when Christine is in the cafe's kitchen talking to June, she adds mashed potato to a plated-up meal. There is some watery gravy on the plate, but the meat is dry. When she exits the kitchen to give the customer the plate of food, the meat is now covered with a thick, shiny gravy.
When Christine is going up to the penthouse in the lift, (About 28 minutes in), the twelfth floor is misspelt as 'twelth'.