The doctor's Mercury Grand Marquis which is attacked by the miners during the climax switches from an early 1980s model to a 1974 Ford LTD.
At the start of a car chase where Holland lets Rhiana drive, a part of Rhiana's skirt gets caught in the door as she closes it, but it is free in subsequent shots.
At the opal mine, Holland cocks his gun twice without firing a round in between.
The red sedan seen during the car chase switches from a 1979 Chevrolet Malibu to a 1981 model.
When Holland kicks the man (with a hose tied around him) out the window, you can clearly see the mat he falls on.