Revealing mistake: When Barabarella and Pygar are being attacked by the leather guards in the labyrinth, Barbarella tells Pygar to shoot to the right. Pygar, howver, swivels left and shoots, hitting the guard dead on. Since Pygar is blind, he had only her instructions to go on.
Revealing mistake: Right in the beginning, during the opening credits, Barbarella is in an anti-gravity state, floating in the air. However, her hair is still falling down toward the ground instead of floating.
Revealing mistake: When Barbarella walks behind her dressing room, then comes out seconds later, with no cut, you can see that the light on the walls drastically shifts during the shot, showing that the shot was paused, to achieve this effect.
When Barbarella first has to go down for an emergency crash landing, she puts her right arm up to her head in panic. However in the next shot it is her left arm that is up to her head instead of her right.