When the cop car pulls up to Lubeck's gas station, it is parked very close to a post, seconds later when Lubeck steals the car, he drives forward without hitting the post. The car was obviously moved between shots.
When Eileen drives Vincent in her car, the same rear projection scene is used twice.
The position of the mother's head on her death bed changes between the long shot and the close-up.
When Johnny spots Marty at the front of the bank prior to the job, his position changes between the long and close shots. He is standing closer to Vincent and his hand, which was removed from his pocket, is now back in it.
When the taxi pulls into the gas station during the dry run, about 35 minutes into the film, a shadow of the boom microphone is visible on the pavement, then the side of the car as it pulls up to the pumps.