Factual error: When Judge Smails lectures Danny in his office after catching him with his niece, he states that he has sentenced boys younger than Danny to the gas chamber. Nebraska has never used the gas chamber for capital punishment.
Suggested correction: Does Judge Smalls say the state where he does so?
Continuity mistake: When Maggie and Danny are in her room about to make love, her shirt is down and you can see something under it. The scene changes to a wider shot and her main shirt is further up again.
Revealing mistake: No one dressed as Tony D'Annunzio could swing a golf club, and the "swing" he does produce wouldn't send a ball very far.