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).
Continuity mistake: After Dennis punches Spence in the nose the piano starts playing and Dennis just pushes it to turn it off even though every time they had to turn it on and off before then they had to use the on/off switch. (01:01:40)
Suggested correction: I took it as a very movie-like "when you don't know how to fix/start/stop/do stuff to a machine, just hit it" moment. Thing is though, just mere seconds before in the same scene, Howie Mandel bumped against the piano, hitting harder than it does to stop it, and it kept going, so I do think that this entry has some merit.
This correction is unnecessary. It validates the original mistake at the end.
The original contribution points out something that, especially in movies, happens a lot: hit some device and it stops. Personally I don't see it as a mistake and I would have not reported it. But I do think it's inconsistent, that it stopped that second time and not the first. I could have submitted a new mistake entry but I did not find it necessary, or a request to change the entry's wording, but I think it is best to keep the original contribution and present a possible explanation and suggestion of a possible, slightly different, inconsistency in the same scene.
And none of that is needed. Explaining why a mistake happens is never a valid correction. And explaining the mistake in a different way isn't needed either (although one can change the wording of a mistake if one feels the mistake isn't clear enough).