I always wondered where Shirou lost a big part of his arm, because that's his hand that's resting on Saber's hip.

Are you sure ? i think it's saber's hand, not shirou hand.

Yup, I'm sure. Saber's one right hand is hidden in that smudge of light on the surface and her left arm is wrapped around her waist (because that there just can't be her stomach).

Looks more like Saber's hand.

I'm more interested in knowing why someone flipped the image and messed with the contrast.

hand crisis