Character mistake: When Barry and Rob are in the record store discussing Evil Dead 2, Barry makes a comment about someone offscreen making shotgun ammo in the 14th century. That plot point refers to "Army of Darkness" (the third installment the Evil Dead series), rather than Evil Dead 2.
Continuity mistake: When John Cusack is on the phone to Catherine Zeta Jones he enquires about her marital status. When she responds she is holding the phone in her left hand with a large ring on her ring finger. Cutting away and then back the phone is now in her right hand but the ring has jumped to the ring finger on that hand also. There is now no ring on her left hand. (01:08:15)
Rob Gordon: John Dillinger was killed behind that theater in a hail of FBI gunfire. And do you know who tipped them off? His fucking girlfriend. All he wanted to do was go see a movie.
Trivia: When Rob and Laura are lying in bed listening to Ray aka Ian have sex, Laura is reading a book called Love Thy Neighbor. Later on we learn that Laura indeed did love her upstairs neighbor.