The Springfield Isotopes win the championship at Springfield Stadium while Homer and the guys watch the game live on TV at Moe's Tavern. It is daytime at the stadium, yet at Moe's it is nighttime.
Absolutely no blood in the excerpts of the film "The Bloodening" seen in the drive-in. Moreover, a black & white movie even though the title in the previews on TV was in red.
When Homer, Barney, Carl, and Lenny are singing in the locker room, Lenny's lower half of his body is missing for a few frames.