When harm hears the poachers approaching he says they are wearing yellow. They show one of the poachers clearly wearing a bright yellow vest, but in all the other scenes there is no yellow vest, only a yellow and black checkered shirt.
When looking for a place to land, the trees are all pine and fir but the final tree line before the clearing and those surrounding it are all deciduous. Then whilst hiking they are back to a pine forest until they find the cabin which is all deciduous again.
The hose Harm took off of the Jeep was the PCV breather hose, not a fuel line. Also, the fuel line on the plane wouldn't be just slid over the tubing, the tubing would be flared and clamps would be used to secure the hose to it.
After Harm & Mac encounter the poachers. Mac is shot in her right leg. After Harm bandages Mac's wounded leg. Mac lends on Harms shoulder to be able to walk to get away. Harm is supporting the wrong leg. Mac is putting her weight on her wounded leg. The next scene, Harm is supporting the correct leg(the wounded leg).
The external shots of the plane are flipped when the engine begins to cut out.
When Harm breaks the window in the Jeep, it breaks like plate glass, not automotive safety glass.
When the Sergeant is escorting Angel off the elevator and Angel tries to get a drink from the fountain, the Sergeant says "no, but I'd be happy to kick your butt". His lips say "kick your ass".