When Crockett, Tubbs and Jimmy Borges get into the Cadillac to search New York, Borges isn't wearing a jacket, nor does he seem to have one with him. When he takes off at the end of the scene he's wearing a white suit jacket.
When Crockett is chased by two Levine's brothers (20:05), brown wagon car with white roof slides onto intersection that way, the two brothers are standing by its right side. On the next shot they stand on its other side and car is all brown.
When Margaret gives Crockett JB Johnston's business card, his address is listed as "111 Park avenue". The building they walk into is 405 Lexington Ave.
After Crockett and Tubbs are chased by Lieutenant Pearson in New York (at 48:30), a car drives through the intersection. Its three passengers smile and point at the production. The woman sitting in the front passenger seat can be seen saying "it's Miami Vice!"
In the gun battle in the swamp, the Lt.'s slide on locked to the rear the whole time.
In the shoot out at Delirious, Donny fires 11 times without reloading. That .45 would hold 8 to 9 rounds.
When Crockett and Tubbs meet up at the airline ticket counter for their trip back to Miami, the airline employee mouths a line, but it has been dubbed out. Crockett and Tubbs then speak their dialogue in normal tone and is quite audible.
When Tubbs shoots his shotgun it never recoils. A shotgun that small would have an extreme recoil.