Other mistake: When Hawkeye finds the New York Times Crossword he says, "1 down, four letters..." and "1 across...four letters..." and BJ's answers are "chap" and "cast" but in the shot of the newspaper puzzle we see that both "1 down" and "1 across" are actually five letters each, not four.
Add timeSuper Grover
Other mistake: After Klinger douses himself with real gas (Potter determined that Klinger's can only had water in it, and told Radar to switch the can for real gas), and runs into the shower tent, you hear a nurse scream, and see her run out. When the door is open, there are no stalls to be seen. From all scenes shot inside the tent, you know that the stalls are big enough to be easily seen from the outside.
Add timeMovie Nut
Other mistake: After being loaded with wounded, an ambulance accelerates, turns left and moves out of sight. Immediately after there is the sound of a crash, and the ambulance is lying on its left side. Radar states that it turned too fast and rolled over...but in that case, it would be on its right side.