During the final fight, Steven Seagal throws an attacker wearing a jacket out the window, but the man shown falling to the ground is wearing a sleeveless vest. Also, the body double used is clearly much taller.
When Harlan Banks rappels into the drug dealer's house near the beginning of the movie, he is wearing a snug zip-up jacket, but when he enters the house a moment later, he's wearing a loose button-up shirt.
(at around 28 mins) When the film shows the prison to which Steven is to be taken, the prison seems to be devoid of trees. But in a subsequent shot, a guard is seen patrolling with a tree with green leaves in the background.
In the scene where Seagal interrogates before shooting the goon in the back of the Series 3 Jaguar, the car interior is obviously not a Jaguar, nor are the windows smoked glass.
Max's men claim that the police found Harlan Banks' getaway truck deserted, but the police repeatedly ask Harlan where the truck is.