- Joel's address is given as 159 South Village in Rockville Centre on Long Island. There is a 159 South Village Ave in Rockville Centre but it isn't an apartment complex as depicted in the film.

- The computer used during the procedure is actually an Amstrad PPC (Portable Personal Computer) from the early 1990s.

- A sex scene with Mark Ruffalo and Kirsten Dunst was shot but was cut due to length.