(at around 43 mins) When Gideon is drinking at the bar he unscrews the cap of his bottle completely, then Grange comes up behind him and unscrews it again before pouring him a drink.
(at around 55 mins) During the police pursuit, in aerial shots, the police car has strobe lights and in the ground shots it has rotating lights.
The wound shifts sides on Eric in the first chase/fight scene.
(at around 43 mins) Level of drink in Gideon's glass.
During the office shoot-out with Top Dollar and his cronies, Eric uses 2 6 shot revolvers and doesn't reload either of them despite firing over 20 rounds.
(at around 1h 29 mins) Shelly is shown being defibrillated while fully-clothed. Defibrillators are used only on bare skin.
The subtitle in the opening reads "Devils Night" (sic) plural. It should read "Devil's Night," possessive.
When Eric forces T-Bird to drive, the speedometer exceeds 90mph. Such a speed would be impossible in those cluttered streets and narrow back alleys. Indeed, in all external shots, the cars seem to be travelling half that speed at most.
After Eric is resurrected and goes back to his former apartment, his cat is still wandering around in the building, even though no one is looking after this cat since he died a year ago. However, the apartment ended up being completely abandoned since Eric and Shelly's murders, and thus prone to infestations due to a lack of maintenance. Because cats are natural scavengers, it is possible that the animal had been living on a diet of vermin in the last year.
After Eric wakes from his grave and goes back to his former apartment, the apartment is still considered a crime scene even though a year has passed since he died and the living room is left untouched. It might be unrealistic that abandoned housing would be left unused in cities in that time, but it's not unlikely that there was trouble finding prospective tenants who wanted to move into an apartment where literal murders took place, especially since the criminals were still at large.
(at around 1h 7 mins) At the hot dog stand when Sarah and Albrecht are talking about seeing Eric, the cat, Gabriel, is clearly being restrained.
The crow(s) used are actually raven(s).
When Eric rises out of his grave, his body appears fresh while a year has passed by since. This is a common 'lore' in films about resurrection from the dead.
(at around 10 mins) When Eric Draven returns home for the first time after his resurrection the camera pans past the crow. When the crow is out of the frame we hear the sound of its wings fluttering even though the shadow shows the bird is still.
(at around 1h 30 mins) When the crow drops the ring in Sarah's hand you hear the sound of the ring hitting something hard.
(at around 6 mins) When Sarah takes the first sip of her drink at Maxi's, it sounds empty.
(at around 1h 27 mins) There is a cable visible just to the right of the bell rope as Myca falls down the tower.
Black cable visible on guy Eric kicks out of a chair and through a window.
(at around 1h 2 mins) When the girl walks up from the street to the door of Eric's apartment, dolly-tracks are clearly visible in the full-frame version.
At the pawn shop, Eric is in search for his engagement ring. It seems the pawn shop owner still has it, even though a year has passed. Even other rings from other victims of the gang. It makes no sense for a pawn shop owner to retain these valuables, since it is his business to sell them as quick as possible with a profitable margin.
At the start of the movie the police is inspecting the crime scene where the main character and his finance were murdered. The police officer can be seen smoking a cigarette in the room where the crime was committed and actually putting the cigarette out on the floor, while his colleagues and forensics are still investigating. This would be considered contaminating the crime scene.
(at around 6 mins) At the beginning of the movie, a guy comments on Lake Erie catching fire. In reality, it was the Cuyahoga River that caught fire, but since it empties into Lake Erie, the reference is understandable.
(Around 48 mins) Sgt. Albrecht (Ernie Hudson) tells The Crow/Eric Draven (Brandon Lee) "I'm sorry as hell for what happened to you and your girlfriend." At the beginning of the film it is shown that Albrecht finds an invitation that said Eric and Shelly were to be married the night following their murder. That would make Shelly Eric's fiancé, not his girlfriend.