At the Country Club Christmas party, Daniel's microphone goes from the height of his forehead to his chin and back again.
Carla's skirt is different when she ask the bus driver which bus to take and when she gets off the bus. However, this is due to a wardrobe malfunction. The skirt Carla originally wore came undone when she ran to the bus and was unable to be fixed quickly.
The first time Carla goes to Daniel's apartment and Ernie hands him the check from his father, the check disappears and reappears between shots.
When Carla and Elizabeth are having the sex talk in the park, there is an animal balloon artist behind Elizabeth. The customers change position several times (sometimes, the people altogether) in a span of a few minutes.
The minister at Carla's wedding changes when they are on the steps of the church.
When Carla and her mother are having the sex talk in the park, Juliette Lewis starts to talk very loudly and Diane Keaton looks directly at the camera while trying to quiet her.
Carla tells her father she likes to call Daniel, Danny when he comes to pick her up from school. Throughout the rest of the movie, she never calls him Danny, only Daniel.
It is very evident that Daniel is mentally challenged, so the bartender giving him such a strong alcoholic drink is highly unrealistic.