Visible crew/equipment: During the fight between the Rippers and the guards at Water and Power, you can see the stunt wire attached to one of the Rippers.
Continuity mistake: When Rebecca makes her boyfriend strip, you can see the gun's laser on his hand before she comes around a corner and points the gun at him.
Continuity mistake: When Lori is shoved down the pipe, check out the close-ups as she slides down. At least twice she has one blue eye and one green eye - though her eyes are blue in every other scene.
Audio problem: When Rebecca is filling up her tank gun with beers, you hear her voice but her mouth doesn't move.
Continuity mistake: The Tank alternates between having a silver machine gun to not having one, to having an Uzi 9mm, to having a 40 caliber.
Continuity mistake: Lori had two stolen tanks to convert - a Russian T-55 and a PT-76. The outcome of this conversion is a M3 Stuart with a turret from something bigger - Sherman Firefly or M60. Better than McGyver.
Visible crew/equipment: After the fight between Water and Power and the reapers, once Tank girl lights her stick on the flare stuck in the corpse's mouth, an ordinary car can be seen slowly moving about in the background for a brief moment.
Other mistake: The first time Rebecca gets Keslee's arm stuck, he wipes his head with his hand, but she goes to punch him, her hand passes through the hologram. His hand should have gone through as well. Also, when she shoots the bucket at the end, it dumps water on him, and he coughs, though the water shouldn't have bothered him.