Continuity mistake: Near the end, Kim's string of beads alternates between being tucked inside his jacket in full shots and hanging outside the coat, draped over his lapels, in close-ups.
Continuity mistake: When Deborah Kerr is climbing a tree her boots are clearly shown as dirty and scuffed. Shortly afterward she is seen wearing a pair of shiny new looking boots. She would hardly be carrying a spare pair whilst trekking through the jungle.
Continuity mistake: When the crew do their EVA they start out standing "upside down" on the hull of the rocket with sunlight from the left. They then travel around the hull 180 degrees, an as they do the Sun is suddenly on the right. (00:50:40)
Continuity mistake: Jim Hawkins is stabbed in the shoulder, but when the doctor later treats and binds the wound, it has moved to his upper arm. (01:20:25)
Continuity mistake: When Daffy begins reading "The Scarlet Pumpernickel" at the start of the cartoon, you can see that the script is by the wall. Later on, both Daffy and the script are in front of J.L.'s desk, and a few shots later they are near the wall again.