Goofs

Mrs. Kraft spits on Helen's back. Helen turns around and wipes it off her front.

When Mrs. Kraft rolls down the hill in the desert, her head is pointing left when she comes to a stop. After the edit (when the stunt double is replaced), her head is now pointing to the right. Actually, it is only the camera angle that was reversed. Both characters are in proper spots.

The entire time the stuntwoman rolls down the sand hill (with her head on the left), she hangs onto a black purse in one hand, but when the scene changes to Esther Howard (with her head on the right) at the bottom of the hill, her hands are empty and the purse is nowhere to be seen - not on the sand or anywhere else, even after she stands up and runs away.

When the bellhop and Mrs Kraft are playing cards before Arnett comes in, she has her feet resting on the shelf under the table. After she drops the cards on the floor and the bellhop starts picking them up, when he says - "The ten of diamonds we were looking for...", suddenly there's a pillow on the shelf under the table where there had been nothing there before.

After Mart leaves Helen's room and goes to the room Sam is in, there is sunlight reflected on the wall behind Sam coming from the window in front of him, which can be seen behind Mart sitting on the bed. Yet Helen had told Mart she was reading before going to bed and Sam told the police the next morning that it was 9:30 the night before when Mart came to his room.

Right after budging two people to death Sam walks directly under a street lamp. BUT he casts a shadow to his right against the fence and telephone pole. Only in Hollywood can light make a 90 degree turn.

Woman at beginning walking down steps of Reno courthouse with older man in long shot is clearly not Claire Trevor. It's the same stand-in who is shown getting on train in Reno later (as is already noted here in Goofs).

The stunt doubles getting on the train in Reno are obviously not Lawrence Tierney and Claire Trevor.

They took a train from Reno, Nevada to San Francisco, California, but the shot of the train coming at the camera head-on is a Pennsylvania Railroad streamlined K4 locomotive on their four-track mainline in Pennsylvania.

Claire Trevor's character bought a railroad ticket and would have been directed to her seat, instead of needing to go to the closed club car.

When stuntwoman (as Mrs Kraft) is rolling down sand hill with Mart coming after her, the shadow of the boom mic is clearly visible on the sand. (And it's not there when scene switches to Esther Howard as Mrs Kraft at the bottom of the hill)

After the Coffee Shop worker takes the call for Arnett, telling the caller he isn't there, she hangs up the phone and Arnett says - "A debtor, I take it.." - referring to someone he owes money to. The woman says it was, but the caller would be the creditor and Arnett would be the debtor - the one who owes money to the creditor.