In the New Year's Eve party scene, Deborah is seen with loose hair talking to Dr. Fried and then there is a close-up of Deborah with her hair pulled back from her forehead.
Running to the hardball game on the grass, the girls wear no shoes; when arriving at the fence, however, they are now wearing shoes.
The baseball players are wearing more modern (1970s) workout clothes and have modern updated equipment that did not exist in the 1950s.