Factual error: Lee gasses up his car on the Garden State Parkway while driving Imogene to NYC. Never has there ever been self-serve gasoline in the state of New Jersey.
Factual error: When Imogene is looking for the book, the librarian tells her it is in the non-fiction section, without any further details. Imogene knew only the author's name but goes straight to the book, despite the non-fiction section being arranged by subject matter, not authors.