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/Smith 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.