Pecker serves Miss Emily a sandwich with melted cheese. The close-up shows the sandwich with unmelted slices of cheese.
At the end of the opening credits, Pecker photographs a woman outside the Sub Pit. He is holding the camera vertically, but we are shown a horizontal view through the viewfinder.
When Pecker is talking to Shelly in the laundromat, she is folding a bath towel with a rose print. The camera angle changes to the back of Shelly's head; when it pans back to her front, she folds the same towel again.
In Pecker's darkroom, his prints are being taken out of the fixer after only a few seconds instead of the required five minutes and then immediately hung to dry instead of being rinsed in water for 10 minutes. The basement windows are also uncovered.
When Pecker's mom exits the gallery in New York a cab goes by from the "Checker" cab company of Baltimore.