Continuity mistake: At the end, the barriers outside the tavern change position. (00:21:00)
Continuity mistake: At the bar, we see Mrs. Krabappel, and she disappears for the rest of the scene. (00:13:40)
Factual error: When Bart is trying to escape from the girls at the start, Bart's door opens into the room. This would mean the hinges would be inside Bart's room and the girls couldn't have been able to remove them.
Continuity mistake: When Homer enters Moe's tavern, Moe is playing solitaire. The cards on the table are face down/face up between shots. (00:04:45)
Continuity mistake: When Moe tries the Flaming Homer, there are bottles that keep appearing, and the knife disappears suddenly. (00:06:55)
Continuity mistake: Homer drives to Moe's Tavern with his normal shirt on. He has his green jacket on top of it in the next shot. (00:04:45)
Continuity mistake: During the scene where Homer invents the 'Flaming Homer,' The items that Patty and Selma are holding keep disappearing. The beer can in Patty's hand also appears suddenly. (00:05:45 - 00:06:50)
Continuity mistake: As Homer watches TV at the beginning, if you look really closely, you can see the remote on the couch colored to be exactly like brown. It then disappears eventually, and then reappears. (00:01:35 - 00:02:30)
Continuity mistake: When Barney enters the tavern, we see a guy working with Moe. His hands change position between shots. (00:16:15)
Continuity mistake: When Homer apologizes to Moe at the end, he comes in while the door is left open. It remains closed for the rest of the scene. (00:21:05)
Continuity mistake: After Homer reveals the secret ingredient, one week later, Homer walks into Moe's. In the exterior shot, the door swings open at its right. However, when Moe lights the Flaming Homer, in the next exterior shot, the door swings open at its left. (00:21:00)
Continuity mistake: The angle of the door at the end changes from partially open to fully open instantly. (00:20:30)
Continuity mistake: When the one member of Aerosmith invites Moe up on stage his guitar simply vanishes. (00:13:40)
Continuity mistake: When Lisa asks for a virgin Moe, Homer's Duff can is missing its colourings. (00:11:10)
Audio problem: When Moe says "I'll talk to you tomorrow" to Homer, his mouth doesn't move. (00:15:15)
Continuity mistake: When Moe gets up on stage with Aerosmith you can see the big "Flaming Moe's" sign behind them. However in the close up the sign isn't visible. (00:13:30)
Audio problem: When Krusty arrives at the bar, Bernard says "Hey Krusty" but his mouth doesn't move. (00:11:00)
Other mistake: When watching TV at the start Homer's beer can just says D instead off Duff. (00:02:15)
Other mistake: When Moe is calling for a 'Hugh Jazz' there is a shot of the bar and Otto can be seen in the upper right corner. However his face is all distorted and out of proportion. (00:14:30)