Character mistake: When Tackleberry tells Mahoney that he thinks he's in love with Kirkland, he asks Mahoney to keep it "10-35." 10-35 is radio code for backup. Since Tackleberry wants his feelings for Kirkland to be strictly between Mahoney and him, he should be telling Mahoney to keep it 10-36, the radio code for confidential information.
Suggested correction: 10 codes vary from agency to agency. Surely a fictional city can have 10 codes that don't match with whatever jurisdiction you're referencing.
Continuity mistake: During Motormouth's fight with the two punks watch closely. One moment the grocer's sitting on the back of his truck, his arms on his lap. The very next shot they're suddenly crossed.