Continuity mistake: When Lucy and Jack are walking along the river, a long shot shows them approaching a lamppost with a kissing couple. In the next shot, they pass the lamppost but there is no one there. They finally pass the couple at the next lamppost. (00:46:55)
Suggested correction: The couple is there. They are walking one lamppost before the couple in the long shot, and they are walking very slowly. In the close-up, it shows them just passing the lamppost before the couple. When they do pass the next lamppost, the couple is there as they were in the long shot.
Continuity mistake: When Lucy and Jack are moving the couch into Peter's apartment, Lucy gets bumped and falls into a table, knocking over a vase of flowers. (This table and vase are located directly below a mask on the wall.) Earlier in the film, when Lucy enters Peter's apartment for the first time (to feed the cat) we see her slowly entering the living room in the same area where she later falls - the mask is there, but the table and vase of flowers are not.
Suggested correction: When Lucy first enters the apartment, you can see the mask on the wall, however, they don't pan down far enough where you could see the table. However, when they show her with Jack behind her and the mask on the wall after she knocks over the vase, you cannot see the table either.
