When Junior is throwing stuff around his living room after he hears about Bobby 'Bacala' Baccalieri, Sr. dying, there is a quick scene of him throwing something with his glasses off, and then it flashes back and he's still wearing his glasses.
The bloodstain on the sidewalk is two different shapes depending on the camera shot.
During the lull in Bobby and Junior's game of checkers, the camera cuts back and forth rapidly several times between the two players. In each shot the pieces are in different positions on the board.
When Mustang Sally is at the kitchen sink to pour Bobby Baccalieri's father a glass of water, two pot holders can be seen hanging from either side of the cupboards. When Baccallieri's father rises to approach Mustang Sally, the right pot holder is absent, only to reappear in position a moment later.
When Tony shows his driver's license to the police officer, he folds his wallet to show him the "Policemen's Benevolent Association" card. Immediately following, the wallet is seen again and it is again unfolded.
The US Flag draping the casket at Febbie's funeral is displayed with the blue field covering the deceased's right shoulder. The flag should be displayed with the blue field covering the left shoulder (heart). Also, the flag is missing when the coffin is placed in the hearse. The Flag is normally folded at the gravesite, immediately prior to the burial.