Continuity mistake: When the moth is in the bar, he pulls off part of the man's trouser leg and eats it. You can see that the tear mark has pieces of cloth around it, but when the moth says "And pre-war cuffs too!" the pieces of cloth have completely disappeared.
Continuity mistake: When Jerry runs onto the record player, he runs next to a button panel and there are four buttons on it: Fast, Stop, Start and Change. But when he is pressing random buttons later on in the cartoon, a "Record" button has been added and the "Change" button has disappeared.
Continuity mistake: When Alice feels like she's being stalked on the street, she stops and holds onto a lamp post. Next scene, she's standing next to the lamp post instead.
Continuity mistake: When Bugs hides in the hole from Elmer, he puts the cow skull over the hole. Elmer then takes away the skull and then puts his head in the hole. At this point, you can see that the background is a desert, but when Elmer takes his head out of the hole, it has changed to a cliff. The background goes back to a desert when Bugs appears in the next shot.
Continuity mistake: When we see Donald Duck at the beginning of the cartoon, he is holding a piece of paper in his left hand, but in the next shot the paper has disappeared.
Continuity mistake: When Holmes reveals that Sir Evan is the mole, the Nazi gives a big smile and we can see that his entire right cheek is shadowed. In the next shot, there is no shadow on his face and he remains serious. In the next shot, Sir Evan smiles again and the shadow has returned. (00:58:56)
Continuity mistake: When Daffy sees Dr Jerkyl's house, he is holding a telegram in his hand that disappears when we see him in the next shot.
Continuity mistake: When Elmer opens the door and finds Bugs at the dressing table in ladies' underwear, you can see the door is positioned on the left hand side of the frame. But when we see Bugs, the door is now on the right hand side.
Continuity mistake: Holmes says "One last warning" and looks at the Nazi on his left. In the next shot, he's now looking at the Nazi on his right. (00:03:48)