When Radar finishes his song after Colonel Blake's announcements he doesn't press the broadcast button yet it still has the echo from the outside speaker,
When Hawkeye reads Klinger's thermometer during the exam, he questions the reading, saying "two degrees of temperature?" He is using a standard oral thermometer, which does not start at "zero," but rather in the low-to-mid 90 degrees F.
When LTC Blake makes announcements, he mentions one of the films to be shown later would be "Godzilla and The Bobby Soxers". It is obviously a spoof title, but is also an anachronism. The Korean War was fought from 1950 to 1953, but the first Godzilla movie was not released until 1954 in Japan (1956 in the USA).
A movie announced over the loudspeaker is Godzilla and the Bobby-Soxer. The first Godzilla (Gojira) Movie came out in 1954, a year after the Korean War ended.
The premise of the story is Trapper has an ulcer that was possibly caused by the amount of alcohol they consume yet for the rest of his time in camp they drink like nothing happens,
Hawkeye does not use his stethoscope when taking Margaret's blood pressure, which would have been necessary to do with the style of gauge he was using.
When Hawkeye is giving Margaret her physical he puts the cuff of the blood pressure gauge around her forearm. The cuff must be around one's upper arm to take an accurate blood pressure.