When Jen and Morgan pull into the supermarket to get the turkey, she drives right up to the door and like in most films, a parking space is available, however through the snow cover a partial handicapped blue square is visible on the ground marking the parking spot reserved for disabled, neither Jen nor Morgan are.
When Jenny and Morgan are driving home from picking up the bike and sitting in the car in the driveway, she is not anymore wearing the same jacket and scarf she wore before, she wears the outfit from picking up Morgan from the Airport at the end at the movie.
In the opening airport scenes several of the same people repeatedly cross behind the main characters. For example: Black fellow in yellow and black jacket (which at one point is removed), fellow with red backpack, woman with pink knit hat, etc.
In a last desperate attempt to play match-maker between his niece and Morgan the free-spirited globetrotter, Henry Winkler hides Morgan's passport. Something that would _not_ be necessary on a domestic flight between Chicago and Denver, even under the Real ID Act of 2005, provided Morgan had an up-to-date American driver's license.
It's clearly stated that his last driver's license was when he was 18.
When Jen is sitting on the steps with Uncle Ralph after she broke up with Richard she is wearing a blouse that has buttons on the right side. Women's blouses generally have buttons on the left side while men's shirts have them on the right. She is either wearing a man's dress shirt or a woman's blouse that doesn't follow fashion norms.
At the beginning of the movie when Jennifer's neighbor asks about when her Christmas lights are going onto the house, Jennifer says she hadn't gotten in contact with her light guys yet. As she closes her door an starts her car to leave, you hear the typical starter sound from the engine as she begins to leave. Well, the Toyota Prius does NOT have a "starter" like regular cars. You can't hear when the engine starts because the motor-generator turns the engine to start, so it's virtually silent when the engine starts up.