I've noticed that in several scenes, there seems to be an apprecialble amount of background noise:
Wedding - from inside Vito's office you can clearly hear not only the band, but people talking, etc.
Sollozzo Meeting - one can clearly hear the street noise; even when Vito is leaving and putting on his coat
Family Meeting - after Mike takes over, the fish tank bubbling.
Anybody else notice? Did you find it distracting?