Corrected entry: When Jack and Lucy take the moving truck to Peter's apartment to unload the engagement present, Jack parks very close to the car in front. Sandra Bullock gets out of the truck and says "Bill I think you parked too close..." and then makes a "whoops" face as if she made a mistake. She has called Jack by the actor's name (Bill Pullman).
Corrected entry: After Lucy jumps off the platform to save Peter and the train finally arrives, the shot from above shows them under the edge of the train, as if they are being crushed. The next shot from the side shows them safely clear of the train but reveals that there is no space under the train for them to have survived as the train supposedly passed over them.
Corrected entry: Lucy and Jack end up walking back to Lucy's house when Jack's truck is blocked in at Peter's high-rise apartment. However, Peter's apartment is a very well-known building right off of Lake Michigan, and Lucy's apartment is in a style not found within about 4-5 miles of that spot. Lucy states she is planning to walk to her apartment (even before Jack offers to walk her) - no way would she have been planning to walk between 60-90 minutes in the winter cold.
Corrected entry: When Lucy is in the back of the delivery truck with Jack when he comes by to drop off the loveseat, she sits in a rocking chair he had made. If you look before she sits in it (when she is getting up into the truck), there is a strap holding it in place so that it won't move around the truck. When she sits in it, the chair rocks...impossible if it's strapped to the side of the truck.