Continuity
In the first film, Dar's symbol is on his left hand. In this film, it's on his right hand, as seen in the battle against the creature, at about 19:20.
Near the end, when Jackie and Dar approach the military base, they are on a Mercedes. A few shots later it has become a BMW.
At the end, just before Dar returns in his world, Jackie's car is facing the wall. After Dar leaves, the car is on the other side.
Revealing mistakes
During the closing credits the Beastmaster can be seen running in front of the sunset with the tiger by his side. This sunset is actually a painted backdrop, and after some time the tiger pauses for moment showing that they are only moving on the spot.
