When the Sergeant Major Bloomer sounds the wake up call in Melly's hut, the Sergeant Major's rope on his uniform is on his right shoulder. But in the next shot when he is shouting at Sgt. Len Able, the rope is on his left shoulder.
When the female recruits parade topless, only half of them assemble. This was due to the refusal of the principal cast to take their tops off.
When the toggle on the gun is pulled back that supposedly injures Captain S. Melly's fingers, it doesn't actually make contact with them.