As Klinger and Zale are trying to get Sgt. Gribble, the drunk bomb-disposal expert, to the Swamp, Col. Potter says that he's seen successful transfusions with 20% alcohol. This is beyond impossible, as the generally accepted lethal blood alcohol concentration is approximately 0.40%. A person would be dead long before his/her BAC even got to 1%, let alone 20%. Potter probably meant 0.20%, not 20%.
During the O.R. session where BJ is asking Hawkeye to "name that tune" (which he calls "The Musical Clock"), Charles is at his operating table just standing there watching the actors go through the scene. The nurse at Charles' table looks like she's working, but Charles is doing nothing.
Shortly after Radar hooks up the phonograph and begins to play records, wounded arrive. It stands to reason that very little time has elapsed since he got the phonograph from the swamp, where Hawkeye and BJ were visibly intoxicated, yet they are in the O. R. operating a short time later.
At 7:43, Radar is in his office selecting the next song to play. He begins talking "And now music lovers..." but he isn't holding in the "on" button for the microphone, something he berated Col. Potter and Klinger about in previous episodes.
In the OR, BJ names the tune that Radar is playing over the PA as "The Musical Clock." In fact, the title is "The Syncopated Clock" by Leroy Anderson.
Colonel Potter mentions the fact that he met Doris Day "a dozen or so years back". He would have met her no later than 1940, which would have made her no older than 16. Even if the story is true, it's highly unlikely he'd have known who she was until much later.
When Hawkeye and B.J. enter Col. Potter's tent with their cots to stay the night, Potter quips, "Hope none of you boys are sleepwalkers." But Hawkeye had already experienced several episodes of sleepwalking during the previous season's "Hawk's Nightmare," so Potter would have been aware of it.
In an early scene, Klinger and Radar are standing over a record player and Klinger is trying to talk Radar into acting as a DJ over the PA system for the camp. Radar is hesitant about speaking over the PA system. But this is inconsistent with his actions previously in the series. He read a personal letter from home over the PA when only Seoul City Sue was on the radio (Bombed (1975)) and even sang part of "I've Got a Gal in Kalamazoo" over the PA (Check-Up (1974)).