In the scene where the media surround Ellen Mason's apartment, an ice cream van has an erroneous apostrophe advertising "Frozen Treat's".
The Metro Dade Parole and Rehabilitation Department has misspelled a word on their sign as "Rehabilatation."
The local TV station's call sign/station ID seen on a couple vehicles, KRQE, is not a possible call sign/station ID in Miami. All TV and radio stations east on the Mississippi start with a "W". Only stations west of the Mississippi have call signs/station ID that start with a K. Of course, the producers know that, because they work in the television entertainment business. This is obviously to avoid lawsuits.
When Crockett and Tubbs are driving to Hatch's address, the footage is reversed -- street sign lettering is backward, the Ferrari's single side-view mirror is on the passenger side of the car instead of the driver's side, etc.