Deliberate mistake: There's a bizarre editing gaff in the opening fight of the Director's Cut. At one point, Fasil's sword vanishes (for no real reason) and he starts to do backflips. The scene then cuts away, and when it cuts back, he's suddenly running and has his sword again. A few shots later, he's suddenly doing backflips and has lost his sword again. (It's meant to be Fasil doing the flips.) The editing makes absolutely no sense. It's like they somehow mixed up two different scenes during editing.
Continuity mistake: Connor decapitates Fasil holding his sword with one hand, but the close-up shows that he's using both hands. (00:09:25)
Factual error: The marine unloads his Uzi at Kurgen, about 10 seconds of full-auto fire. The Uzi fires at 600 rounds a minute, so can only fire for about 3 seconds (with a magazine the size he's using) before running out of ammo.
Character mistake: When Brenda first witnesses Connor and the Kurgan fight, Kurgan says "I am the only one." Afterwards, Brenda asks "What does he mean by there can be only one?" She somehow misheard Kurgan and thought he said the movie's iconic catch phrase.
Suggested correction: This is incorrect. He does say "There can be only one." He's saying it while beating Conner, so the first part is a little muddled and he emphasizes "one", but he does say the line.
Visible crew/equipment: When Connor and Heather are making love on the knitted blanket, the shot from above them shows the edge of a white and blue blow up bed just below the blanket. (00:38:18)
Audio problem: After Connor and Brenda's sex scene, we see them in a zoo in front of a lion cage. After his line : "I can't get involved, not again", we see Brenda talking back to him but nothing is heard. (01:36:33)
Continuity mistake: When the marine starts shooting about 5 shots rip through the Kurgen's stomach, but in the long shot when his arms are outstretched there are no holes or blood, then they reappear for the following shots.
Revealing mistake: When McLeod has his sword kicked away in the carpark, he grabs a metal pole from the fire point, only it bends when he grabs it and bends several times when he uses it, showing that it's made from foam rubber.
Factual error: In almost all the swordplay, most of the parries are shown as edge-on-edge. This simply was not the norm. Edge-on-edge destroys swords. It ruins the edge and will cause them to break. Parries were done with the flats and deflection.