In the jail house scene, Charleston (Vince Barnett) tells The Swede (Burt Lancaster) of his love for the stars. As he looks out the window, he says that he says he sees Orion and a prominent star, Betelgeuse. He says that Orion is the "Great Bear" and that Betelgeuse is the "brightest star in the sky." Orion is actually The Hunter. Ursa Major (containing the Big Dipper) is the Great Bear. Betelgeuse, while quite bright, is actually the 9th brightest star.
When Reardon goes to visit Lubinsky, it's clear that neither Lubinsky nor his wife have been informed of The Swede's death. By the end of their conversation, Lubinsky talks about having claimed The Swede's body and informs Reardon that the burial is later that day.
As Kenyon is reading the story of the robbery in a voice over, the scene shows the gunmen escaping and exchanging shots with the factory guards. The story says the guard was hit in the groin, but as he falls he grabs his shoulder.
There were several errors involving the firearms used. When Burt robs his cohorts, the gun is obviously not real, probably rubber, because the barrel is pointed downward from the frame. If he were to shoot at someone's chest, the bullet would probably hit below the belt. When Edmond O'Brien is holding his pistol at the bad guy, he says it is a .45, but a trained eye can see that it is either a .32 or .380, most likely of Spanish origin. When Edmond asks Sam Levine if he has another .45 for him, Levine says yes, but the gun turns out to be a .38 revolver instead.
When Reardon enters the insurance company's home office, he passes by and open glass door with the company's name on it (as seen from the inside of the office). When closed, the name would be facing the inside and not towards the outside of the office.