Continuity mistake: When Potter is on the phone, he turns to hush Hawkeye and BJ. As he does so, he's holding the receiver with his left hand, and covering the mouthpiece with his right. He then puts his left hand down on the arm of the chair. When the camera cuts in for a close up, his left hand is on the phone again.
Revealing mistake: A number of times, during the night periods (for instance, during an OR scene) the windows are dark when the lights are on in the room. Then when the lights go out, the windows brighten up. They, and the interior lights seem to alternate lightening and darkening.
Plot hole: In this episode, the military money, or scrip, is being called in and exchanged for a different color (and assumedly design - otherwise counterfeiters could just keep using their printing plates) to battle counterfeiting. However, in previous episodes several colors of scrip are being used equally and at the same time - e.g. in episode "Hey, Doc" (4-5), Sgt. Kimble collects a pot consisting of both blue and tan one-dollar scrip notes. No previous indication was given in the show that the army started a practice of using just one color at a time.
Continuity mistake: When Klinger refuses to give Winchester the letter from his sister, Winchester screams at him, Klinger jumps and falls to the ground next to Winchester's bunk. After the cut, Klinger is sitting next to Hawkeye's bunk (note the airplane seat in the background instead of the door) and Winchester is holding the letter in his hand opening it. Rightfully it should be on the floor next to Winchester's bunk. If you look closely, you can see it flying out of Klinger's hand towards the door.
Revealing mistake: When Radar walks into the supply room, he carries four or five ammunition belts around his neck. Since he stows them in the gun bin, it has to be assumed that they are not meant to be empty. If they were only half filled each, he would still be carrying something in the area of 60-100lb. However he moves with absolutely no visible strain and tosses the belts into the gun bin with ease. Elsewhere in the series Radar is depicted as being none too strong. Clearly the magazine pouches were stuffed with something light and the effect carrying the real weight would have on Radar was overlooked.
Continuity mistake: When Hawkeye gets into the chow line and Igor suggests the peas and carrots, Hawkeye asks about the beans. As the peas and carrots are being scooped to be served to Hawkeye, he grabs Igor's arm and peas and carrots are spilled into the beans. Peas are VERY visible in the beans. The next shot with the beans, the peas and carrots have been removed from the beans.