Corrected entry: The movie is supposed to take place in Ohio but the cars have California License plates. For example Glen's car in the beginning and Nancy's Mum's car at the funeral.
Corrected entry: At the police station, Nancy's mother Marge says to her husband, "Apparently he was crazy, John." The husband's name is Lt. Don Thompson. John is the actor's real-life name.
Corrected entry: After Rod dies and it cuts to his funeral, you wonder how they managed to organize such a funeral so quickly. Nancy couldn't sleep or she would dream of Freddy, so his funeral must have been the next day. This leaves two conclusions: one, Rod's funeral is organized in amazing speed (Try organizing a small scale funeral and it will take days - especially since Rod would have had a post mortem since he died in a prison cell in an "impossible" circumstance) or two, there is a major time frame gap where Nancy had been sleeping perfectly ok.
Corrected entry: When Nancy is secretly staying awake by drinking coffee and trying to contact Glen, notice her alarm clock on her bedside table. However when she rips her phone out of the wall in frustration, the alarm clock has vanished. This was probably done so they didn't have to keep the time correct on the clock (since you were shown the time in earlier scenes) to allow for cuts, etc.
Corrected entry: In the scene where Tina dies, she gets up from the bed (in the dream) and gets dressed. She was naked before, meaning she must have gone to sleep naked. When Freddy chases her down in the dream and we see her writing around on the bed, she is clothed. How could this be when she went to sleep naked?
Corrected entry: Before embarking on her final dream quest, Nancy sets the timer on her wrist watch to ten minutes. When the timer reaches zero, the alarm goes off and she wakes up. However it is not her wrist watch sounding the alarm but the alarm clock on the table, at least we hear the exact same physical 'brrrring' sound we heard before, instead of a digital 'beep beep' a quartz watch would make.
Corrected entry: When Johnny Depp's character falls asleep on his bed, the television signs off, the announcer saying that its midnight. After he's already dead, and the police are there, Nancy talks on the phone with her dad, who is at the crime scene. She asks him to come over and break the door down in 20 minutes, at 12:15.
Corrected entry: When Nancy is running up the stairs she steps in some goo resulting in her feet becoming dirty, however once she reaches the top of the stairs her feet are clean.