When Barney and Kitara are removed from the hotbox little or no perspiration is seen on their faces or clothing.
When Kohler is on the run in the jungle, it's supposed to be night, however, when Kohler is caught, you can clearly see a bright blue sky through the trees.
As they pull the thatch panel from in front of the gold bars, several of the bars are pushed back slightly from the motion. Gold bars are far too heavy to be moved by a few blades of grass.
When Barney replaces the tungsten halogen light bulb at Colonel Kohler's residence, he holds the new bulb with his bare fingers. As a technical expert, Barney would wear a glove or hold the bulb with a cloth as he'd know that his skin oils could create a hot spot that could cause the bulb to crack or even explode when turned on.