When Hawkeye leaves for the peace talks, the rear seat in the jeep he is driving is loose and bouncing around. When he returns the seat is in its proper place.
Hawkeye is angry when the Army increases the points needed for a discharge. In reality, the point system was never available for the rotation of surgeons.
Throughout the episode, Loretta Swit's fingernails are over an inch long. No nurse, especially a head nurse, would have fingernails that long.
When Hawkeye returns from the peace talks and gets out of the jeep, the shadow of a boom microphone can be seen at the top left of the shot.
When Hawkeye arrives at the peace talks, by the sound and lighting, the scene was shot on a soundstage, not outdoors.
When green material is dyed with red dye it turns brown, not red.
When Radar reads the roll, he reads Colonel Potter's name and his own, then starts on the officers. In a military unit, the roll would have gone through all the officers first before the enlisted, so his name would not be before the rest of the officers. Also, every nurse is an officer, but the roll jumps from Captain Honeycutt to Corporal Klinger, bypassing the nurses.