When Helping Hand Acceptance Corporation head-honcho Oly goes out to look for the Malibu, as he is leaving, he says to Otto "keep making me money kid", to which Otto says "Fuck You", however his lips are saying something completely different
When the motor-cycle cop walks to the back of the Chevy Malibu to look in the trunk, the number plate is "K8B 283". As the Malibu drives off, leaving the cop's smoking boots, its number plate is "127 GBH". According to the director's voice-over, these takes were months apart because the original Malibu was stolen from the set.
As Bud falls backward in the convenience store shootout, one shot shows his pistol hitting some bottles. The slide is locked to the rear, which can only happen if the magazine is completely empty, although in the previous shot it was forward and Bud hadn't fired.
In the scene where Otto walks into the Repo Yard for the first time after following Bud in - you will notice that the Open/Closed sign changes back and forth during the scene (indicative of multiple shoots).