Catch-22 (1970)

Continuity mistake: When 1st Lt. Milo Minderbinder has the egg in his hand and is explaining the profits that can be made, the egg is suddenly gone as he begins walking away.

Continuity mistake: General Dreedle is riding in a Jeep with Colonel Cathcart running alongside. When he stops in front of one plane the plane right behind them has a large number 60 on the tail. When the screen pans out to show him getting off the Jeep the plane behind them now has a large number 68 on the tail.

demodon

Revealing mistake: During the Flak attack on the B25s Arfy notices Orr's plane going down. The scene cuts to a smoking plane going down at a steep angle, but you can see the plane was flying straight and the film turned at an angle as the colors on the horizon are also at a steep angle.

demodon

Colonel Cathcart: You're a disgrace. I'd like to know how you got to be a Captain, anyway.
Yossarian: You promoted me.
Colonel Cathcart: That has got nothing to do with it.

Yossarian: I am the most renowned killer of fish in the whole United States Army Air Force.

1st Lt. Milo Minderbinder: Nately died a wealthy man, Yossarian. He had over sixty shares in the syndicate.
Yossarian: What difference does that make? He's dead.
1st Lt. Milo Minderbinder: Then his family will get it.
Yossarian: He didn't have time to have a family.
1st Lt. Milo Minderbinder: Then his parents will get it.
Yossarian: They don't need it, they're rich.
1st Lt. Milo Minderbinder: Then they'll understand.