When the bomb is being prepared, we see two standard gas cylinders. One is labeled Hydrazine and the other is Liquid Oxygen. LOX is a cryogenic liquid that boils at -183°C (-297°F) and must be stored in a proper container. If there were LOX in the cylinder, it would be covered with a very thick layer of frost.
One the second shot of the gate overheating, the shadow of a stairway railing is seen on the gate. This indicates the red light is projected on the gate, not being emitted from it.
The browser address field indicates that the Findorama login page Maybourne is trying to use is not a page on the Internet but a file on the computer hard drive.
Incorrectly regarded as goof: Kinsey calling O'Neill a General when he hasn't been promoted yet. Kinsey actually says "gentlemen", not "General".