When George and Nina are kissing on the bed, Nina unbuttons his shirt, then when he answers the phone his shirt is fastened again. He then gets up and walks away, shirt open.
At the wedding that takes place the day after Thanksgiving, Nina is dressed in a summer dress and sandals, an outfit that would be too cold to wear in New York in the fall.
In the scene at the beginning, where Nathan and George were peeping out from behind the curtains at the school play, and Nathan asks who George is waiting for, Liam Aiken mouths Paul Rudd's next line.
After lying face down on the bed, Jennifer's microphone pack causes a large bump on her lower back under her T-shirt as she gets up. Shortly thereafter, it is seen again as a large bump in the back of her shorts.