Becky plays hopscotch with Will and David in the street.
Becky complains as she is wearing high heels, however when she arrived at Will's house a few minutes earlier, she was wearing flat shoes. Later, at Becky's parents house, the flat shoes mysteriously return.
When Will and Becky kiss at the end of the movie, Will's left hand changes position from shot to shot. It starts on her right ear, moves to behind her right ear in the next shot, to on her lower back on the next shot.
Will and Becky walk into the commercial space for lease without anyone inside. The door would not be unlocked free for anyone to wander in as they do.