In the "Wise Up" sequence, Claudia is dressed for her date, she's wearing black and her hair is up. When she opens the door to Jim, she's wearing red, her hair is down. On the way to the car, she is again wearing black etc, and at the restaurant she is back wearing red.
The view from the inside of the Barringer's apartment shows Sydney Barringer falling and being shot in the stomach as he passes by the window. However, the same incident viewed from the outside clearly shows Sydney falling with his feet oriented directly toward the apartment window as he passes it on the way down.
When Linda Partridge is swallowing pills in her car, it's raining outside. A few minutes later, when she's passed out, the car is bone dry.
Two lights on the back of the ambulance are on and off in consecutive shots.
When Officer Kurring is leaving the station and walking to his cruiser in the beginning, he is carrying a shotgun. In the next shot as he steps into the cruiser, in the same hand he is holding a night stick and a flashlight, and no shotgun.
When Linda Partridge is first placed in the ambulance, the EMT crew is not providing ventilations for her after stating that she has six respirations per minute. This would be priority and the crew should have been using an Ambu device on scene. Such equipment is not seen until later.
During the early sequence with Delmer Darion working as a dealer in the casino, he lays down an eight of diamonds, but it is the only card in front of the pilot. In this style of blackjack, the player holds the first two cards in his hand.
WDKK is not a geographically misplaced TV station, but the abbreviation of the TV show "What Do Kids Know?"
In the scene where Donnie Smith is robbing the furniture store he previously worked at the poster on the door reads, "Keep Door Lock at all times!", instead of "Keep Door Locked at all times!" Due to the owner's accent, it can be assumed that this was just due to him being a non-native English speaker and writer.
When Claudia brews a pot of coffee for herself and Officer Jim Kurring, she clearly holds the pot with two hands, one hand being on the glass and one hand on the handle. Since she is coked out and we can assume that she spends much of time under the influence, it can be assumed that she may not realize the pot is hot. Combine the effects of coke with the anxiety she is feeling for having a cop in her apartment and it is easy to believe.
She also clearly stated that the coffee had been sitting around and probably wasn't even hot.
Water seen through restaurant window behind Claudia, after rainstorm stops. Apparently a waterfall in the courtyard.
The narrator tells us that Sydney Barringer was killed instantly when shot by his mother, but he braces for the impact with the safety net at the end of his fall.
Officer Jim Kurring wears sunglasses while driving that reflect the camera mounted on the hood.
Shadow moving on the wall behind Frank Mackey as he sits down beside Earl's deathbed.
After Stanley breaks into the library, a wireless mic pack can be seen on his belt when he sits down to read.