During the beginning of the initiation ritual, the girls' chanting does not match their lip movements, and many of the actresses are clearly not speaking at all.
Kelly's mother runs outside to give her husband his glasses. Just after she mentions him "forgetting his head if it wasn't attached" the scene cuts to the car driving away. On the left, there is a crew member standing with his arms crossed.
In the final shot where Nurse Higgins is murdered in her station wagon, the crew members and their equipment can be seen reflected in the passenger side windows of the car.
When Ralph and Marcia are 'in bed' together, he inexplicably calls her Alison, twice. Moments later, Alison makes a noise to demand attention, so this might reflect an editing change, but it looks (in this cut) as if Ralph mistakes who he is with.