Visible crew/equipment: In the final fight scene on top of the submarine you can see the ripples and shadows on the painted sky backdrop behind the submarine. (01:31:05)
Revealing mistake: When Robin is trying to get the sub to surface using Bat Depth Charges, the sub is rocking violently. The rack that contains the vials with the Security Council's dust not only sways back and forth, but lies nearly flat several times, and always at impossible angles. This goes against physics, and gravity. The rack should have fallen off the table more than a few times.