Images of the world and Sleeping Beauty recur in the film: the young version of Lucy in the beginning is being read "Sleeping Beauty" by her father (the film is a role reversal of "Sleeping Beauty": Peter is the beauty, and Lucy the Prince); Lucy has a globe in her apartment (visible after talking to Jack), and of course the gift of her mother to her father, the light up globe lamp recurs as well.
When Jack and Lucy parked at Peter's apartment to deliver the couch, the van is parked much closer to the red car in front before they deliver the couch than when they come back down.
When the grandmother is taking pictures at the wedding in the hospital, she is pointing the camera at the floor when it flashes - the flash cube is pointed at the people she wants to take pictures of.
In the last shot, the iconic Marshall Field's clock is not visible in that position on that elevated train line (northbound heading toward the now non-existent Sun Times building).