In "Sometimes You Hear The Bullet" when Henry presents Frank with a "Purple Heart" (Hawkeye replaced it with an earring) he calls him Franklin D. Burns but Franks middle name is Marion.

AND

In the "The Price of Tomato Juice" when Frank asks Igor (the guy that hands out the food in the mess tent) his name he replies Maxwell. This could be the actor Jeff Maxwell forgetting his character's name.