When Miss Chadwick is talking to Tom during the flat tire scene, the wipers on her car are up on the windshield as if stopped while in motion. When she gets into her car to leave, and there is a close-up of her face you can see that the wipers are down before she restarts the car.
At the beginning, there is an old newspaper article on the wall that is dated Saturday, June 4, 1971. In 1971, June 4 was actually a Friday not a Saturday.
When Albert and Jeff are talking in the hall in the beginning, a microphone can be seen occasionally in the picture above Jeff's head.