When Joe and Diane meet again at the fancy joint, Joe is shown putting his cigarette out twice between shots, and a matchbook suddenly appears besides the ashtray on the bar as she walks over to him.
When Joe and Diane have finished breakfast at the motel, Joe lights Diane's cigarette and then puts the matches back in his shirt pocket twice between shots.
When Joe pushes Webb's car off the road (with Webb in it), the car shown as crashing and burning is a completely different one.
In a scene where Miller and Egan are in a chase car the background footage includes vehicles from earlier decades, obviously older stock footage.
Miller tells Joe Peters he revealed himself as being associated with the robbery because Peters had said five men (plus the pilot) were involved at a time when that information was not known to the insurance company. Yet, immediately afterwards, Egan is cross-examining the pilot and mentioned the five men as though it was a fact, before the pilot actually admitted it.