The police drone describes Leonard as "balding" even though it has not seen him without a hat.
Despite Stockwell and Mead being outside people's homes, and quite a few feet away, at night. Various home-owners television sets can be heard from indoors clearly, even though all the windows and doors are closed. At best, all anyone would hear is muffled sounds.
Even though Bradbury and the main characters stress the importance of wearing tennis shoes so as to reduce the sound and clearly showing the characters wearing them, two scenes have clearly been dubbed with sound effects of hard-soled shoes on concrete steps echoing in a stairwell. Since they are wearing tennis shoes, their footfalls in the stairwells should have been silent, or nearly so.
Why does no one ever come to the window of their homes to see what is causing all the commotion so late at night? The residents of the housing complex would surely have a vested interest, given that the helicopter megaphone has announced that a possible prowler has been identified. In fact, Mead and Stockwell are the only two characters in the story.