When Joe climbs through the post office window he kicks off the bell. When he gets through the bell is back up on the counter.
When Joe is at dinner with Mulcaheys, his wine glass moves back and forth on the table between shots.
When Bertie and Diana's father meet for the first time, she walks up to the his table with the towel in her hands then it on her shoulder in her hand and back and forth without her moving it.
The jukebox in the bar could not have played "Moonlight Mile" by The Rolling Stones. That song was never released on a single.
Massachusetts did not have the death penalty in the early '70s.
When Joe Nast and Ben Floss are walking down the street, the car holding the camera is reflected in the storefront windows.