Continuity mistake: When Dennis's girlfriend goes to see him at the godfather's house, her car is seen parked directly in front of the house, where the godfather's car was just parked moments ago. (01:18:55)
Suggested correction: Well, yes and no, or rather "no and maybe." The godfather's car was parked far enough from the stairs for another car to park closer, between Pazzo's car and house. And it's what happens here. However I do think there could be a continuity issue with one of the exterior shots when Pazzo's car seems to have been moved quite a bit off position compared to before. The mistake could be there but not as big as it appears to be (I kinda find it hard to judge due to the angle by how much really the car is off position, even, since it's a significantly different one from before).
Revealing mistake: When Roland Tyler (Bryan Brown) beats Lipton (Cliff De Young) with his rifle, you can see that both times he hits him, the rifle bends as if being made from rubber. (00:42:16)
Revealing mistake: The chairman parks his car in front of Bel Fuse Ltd. And goes upstairs. His car explodes, but does it in front of a different building, probably switching to a stage building front; the metal doors don't have vents anymore and there are visible join lines in the asphalt and the cement. (00:15:10 - 00:15:40)
Continuity mistake: When Tommy Tong breaks Jarrel's stick, the broken part of the stick differs between shots. (00:33:40)
Continuity mistake: Connor decapitates Fasil holding his sword with one hand, but the close-up shows that he's using both hands. (00:09:25)
Continuity mistake: At the beginning when the helicopter lands, the helicopter's shadow goes out toward the rear right of it (from the pilot's perspective), but when Sue grabs her bags and walks to Walter, the shadow is now cast to the front right. Since Sue got out and was standing next to it, the helicopter did not move in the meantime. (00:03:15)
Visible crew/equipment: In the scene where Cobretti is talking with the Hispanic guy for the first time (after parking his car) he rips off his shirt revealing a black wire attached to his chest using duct tape. (00:13:30)
Continuity mistake: When all three are having dinner for the first time, Vincent's hands' positions are not continuous between shots. Sometimes they swap between crossed or not, or they're holding a glass or not, or the glass swaps hands.
Continuity mistake: When RJ sits on Jason's midriff he is eating a Popsicle with chocolate on it but in the next shot the chocolate its completely gone. (01:05:30)
Visible crew/equipment: When Skip has just finished snorting cocaine and is talking to Stella, the boom microphone is visible on the top left of the screen.