Continuity: The amount of sweat on Dave when he talks to Dautrieve for the first time.
Continuity: When Robin Gaddis sits at the bar answering Robicheaux's questions she has a drink with spear of fruit. In some of the shots, the spear has an orange slice and two cherries, in other shots, an orange slice and one cherry (and no, she doesn't eat one of the cherries).
Factual errors: As Roger Ebert points out in his review, "a character tastes the ring of moisture left by a cold drink, and identifies who must have been drinking it, even though gin cannot permeate glass and the moisture would have been, according to the best theories of condensation, pure water."