When Vilmer says to Jenny, "I asked you a goddamn question," Darla is looking inside a cabinet in the background. In the next shot she's at the table putting make-up on.
When Darla picks up pizza from the drive-through, the employee in the window repeats her order of two medium pies and one large pie. However, all three boxes he hands her are the same size.
When Heather is taken out of the freezer her dress is almost torn but after she is placed on the hanging hook her dress is back to normal.
Jenny wears a white silk scarf loosely around her neck, as part of her prom outfit. As Leatherface chases her through the muddy river, the scarf falls down her body to her waist. In the next shot though, it's back round her neck. After this, she removes the scarf from her neck and throws it in the river three times between shots.
When Vilmer sets the woman on fire, the flame disappears then reappears between shots.
In the closing credits Matthew McConaughey's name is spelled as "Matthew McConnaughey".
When Jenny runs out the front door, she falls over. She then gets up and slides across the hood of the car. As she does, you can see the black knee-pads she's wearing.
When Leatherface is chasing Jenny onto the roof you can see blocks of wood nailed to the roof as hand and foot holds to help her climb to the peak of the roof.
In the end when Jenny is sitting in a chair at the hospital with a doctor, in the glass screen behind the doctor you can see the reflection of the gurney which will be pushed on-screen in a few seconds. The doctor is obviously waiting with the gurney for his cue to come past.
As Leatherface breaks parts of the front door out with his chainsaw, there are three very large cracks in the door, presumably to help him break the parts of the door out. In all previous shots/scenes, there were no cracks in the same part of the door.
When Vilmer says, "Welcome to my world." his mouth says, "Welcome to my home."
When Jenny jumps through the window, as she lands on the roof she rolls to the side and her legs fly upward. You can clearly see she has protective padded socks on to protect her ankles. She is barefoot in all previous and following shots.
When Jenny runs to Darla's trailer after being chased by Leatherface, she runs inside and trips, and her dress pulls upward, beautifully revealing the flesh-colored kneepads she's wearing for the stunt.
When Leatherface is chasing Jenny, she gets into a couple's caravan. After Leatherface tries to get in, it cuts to an exterior shot and as Leatherface is running along with the caravan, in the window behind him you can see a crew-member with a cap on, running behind him off-screen.
As Vilmer and Jenny are driving along in his truck, in some shots of Vilmer, through the glass of the truck behind him, you can see a crew-member in white, wearing a watch.
When Darla is at Bud's Pizza Drive-Thru, she gets out the car to go round to the boot and tell Jenny off. As she walks round to the boot, in the backseat window you can see the reflection of arms holding a boom mic.