In the scene in the park with the female officer arresting Ajax, the patrol car pulls up and several officers get out. Ajax kicks the one officer but is taken down by the second officer with a nightstick to the stomach. In a subsequent shot showing that officer, the image is mirrored. You can see that the badge in on the right side of the officer and the patrol car is facing the other way.
At the Lizzies' hangout, Cochise smiles while he watches Vermin and a girl make out on the couch. Rembrandt then comes to Cochise to ask him how long they are going to be there, and in the background you can see Vermin and the girl walking to the couch.
Near the end of the opening title scene, Ajax says "Maybe we'll get to bust a few heads along the way". Cut to Cleon saying "You just soldier and keep your mouth shut", then cut back to a quiet Ajax. However in the frontal shots of Ajax, it is not Cleon he is speaking to, it appears to be Thomas Waites as Fox. The skin looks white and you can see a chain on the back of his neck as well as his curly hair. Fox wears a chain with a cross that is visible in several shots. Cleon wears a camouflaged-colored cloth that covers his head and neck.
When the lead Punk gets red paint sprayed in his face, he turns away from the spray and gets very little on his face. In all later scenes, his entire face is covered with the red paint, especially around his eyes.
In the graveyard, Rembrandt is told by Swan to be look out, and Rembrandt climbs on a statue for a good view. Swan then listens to Ajax demanding to be Warlord, and behind him we see Rembrandt climbing the statue again.
After Swan throws the switchblade at Luther, there is no blood on the switchblade after he pulls it out of Luther's arm to cut his hair. There is also blood on Luther's middle finger, but after Swan pulls it out and steps back, the blood is not there.
When all the gangs are running after Cyrus gets wasted, The Warriors all meet up by an old fence to escape. When you look at The Warriors, there is another gang member standing with them, a man in purple, waiting to leave with them.
When The Lizzies are fighting with Rembrandt, Vermin, and Cochise, during the shots of the Lizzies, you can clearly see two different girls shooting guns. However, once The Warriors have escaped, in the final shot of the Lizzies, there is only one girl with a gun.
When the Warriors are fighting Punks in the bathroom, we see Cochise being pushed into one of the stalls. At the same time we can just see Mercy getting out of the stall to the right. Just the second after we see Swan fighting with Mercy standing on the toilet in the same stall as she just got out of. Mercy then gets out of the stall again.
When The Warriors are running into the graveyard, they pass a few gravestones before sitting down. in one of the very first scenes we see, there is a person sitting in front of a gravestone. In a later shot, you see Snow sit in front of the same gravestone.
When the Baseball Furies are fighting with Ajax and Cowboy, the Fury in yellow attack Cowboy, and hits him twice. In the first shot, you see the bat connect with Cowboy, and it knocks his hat off. It quickly cuts away to a second scene, where Cowboy's hat is mysteriously back on his head. This time when he's hit, and falls, the hat stays on his head.
When the Warriors first board the train headed for the conclave, in the shot showing Fox walking toward the camera, you can see that this shot was cut from the later scene where the Warriors board the train after escaping from the Turnbull ACs: The old couple from the latter scene is present and Cleon is nowhere to be seen.
When the Warriors are contemplating their escape from the Bronx and hiding from the Turnbull ACs, they look up at the subway and a J train is pulling into the station. When they finally board the train it is an M train. Additionally, neither one normally went into the Bronx in the '70s.
When Swan and Mercy are walking through the Subway station, before seeing the cop, a passenger can be seen waiting for a train on the far end of the platform. In the next shot, he/she has disappeared, only to reappear in the next shot, only to disappear again when cop shows up.
At the beginning of the movie, The Warriors board a graffiti-stained train of R27 or R30 type cars, which are identical. However in the next shot, a clean train of R40M or R42 cars are shown, which are also identical classes of cars.
In the very last shot of the conclave, just before switching to the graveyard scene, massive equipment is visible to the left of the speaker's platform, including a camera truck with crane lifted, a cluster of flood lights, and several crew members.
At 15:09 of the DVD as the gangs are all trying to escape the area from the police raid, a film crew member with a yellowish shirt is seen with a clearly labeled Panavision camera for a few seconds on the middle far right of the screen.
As the Warriors are running down the middle of the street towards the subway platform in order to catch the subway and escape from the Turnbull AC gang, the overhead view briefly shows camera lighting equipment and the film crew on the left side of the camera frame just prior to the Warriors reaching the street level entrance.
After The Warriors meet and then leave Mercy in the Bronx, she walks the streets looking for them. She passes a black street sign with white lettering (the signs that tell you what street you are on), indicating she is really in Brooklyn (where the scene was filmed), not the Bronx. In the '70s, the street signs were color coded: Brooklyn's was black with white letters/numbers, and the Bronx's was blue with white letters/numbers. (Manhattan's was yellow with black lettering and those are in many shots.)
Incorrectly regarded as Goof: After Cyrus is shot when he is falling off of the platform you can see that the man who falls is white. This is Craig R. Baxley, the only stunt double who was capable of doing the stunt.
Stuntmen were often used throughout the production's fight sequences. In the subway bathroom fight a brief pause at the moment when Vermin is thrown into the mirrors above the sinks will clearly reveal a blonde haired stuntman performing the action.
Luther drops the gun after Swan throws the knife into his wrist. Swan then approaches Luther as he kneels wounded in the sand but doesn't pick up the gun. Logically, it would make sense to grab the gun so no other member of the Punks could use it.
Mercy insults the Orphans' leader for allowing the Warriors to flash their colors in Orphan turf. Why would this pose a problem if a city-wide gang truce were in effect? Gangs from all over the city flashed their colors in the Bronx when attending Cyrus' meeting as a condition of the truce. It was never established that the truce was called off upon Cyrus' death. Fox and Swan could have mentioned this to the Orphans in their parlay. And if the Orphans sought to be "with it", they could certainly honor the truce. [It is repeatedly stated that the Orphans are so far down the ladder that they are not in the loose organization of gangs the Riffs have set up. They did not know of Cyrus' meeting or that he had been killed and that the Warriors were suspected of killing him. Thus it is entirely possible they had no idea there was a truce going on.]
In the graveyard near the beginning when they are discussing returning home, one of the Warriors complains 'Coney Island must be 50 to a hundred miles from here.' Coney Island is actually less than 25 miles from Van Cortlandt Park by foot. While the character may either be exaggerating or genuinely ignorant of the exact distance, for a native of the city this is still a pretty wild overestimate. [This is clearly a deliberate exaggeration to show the ignorance of the character of Vermin.]
Fox is thrown onto the tracks and presumably killed when the train comes at him in the 96th street station. When Swan and Mercy come back together, they go down to the tracks at the 96th street station. There would be police and other crews all over the station had someone been kills on the tracks there just a short while ago, but the station is empty except for one lone passenger.
After the fight with the Furies, Swan makes it back to the 96th Street Station and meets Mercy again. She offers to show him how to get to Union Square, and they both go through the turnstile, without either one of them putting in a token.
In the scene where Luther taunts the Warriors with the bottles, the hearse is parked alongside the ramp, which runs from the boardwalk down to the street. When the hearse is shown from under the boardwalk, the ramp slants down to the right, but in the close-up of Luther, the ramp slants down to the left, plus the whole ramp is about 4 or 5 feet lower.
In the scene when the warriors are on the orphan turf and the orphans run for backup, Swan is talking to Mercy and from behind Swan it can be seen that there are a few of the orphans visible before they all come to attack.
In the Warriors showdown with the subway gang, the "Punks," the fight takes place in a station bathroom containing a long row of wooden enclosing stalls. At several points during the fight scene, members of the Punks are thrown into the stall walls or through doors. Looking at the destruction of the structures, you can see that the wood was all pre-cut to breakaway easily and completely.