When Homer stands up to protest at the ball game, the fireworks tubes in the ground are gone.
Duffman is asked to bring 2 bottles of Duff, but he brings 2 cans.
Order of condiments on hot dog switch between views.
The condiments on the hot dog towards the end of the episode obviously change position.
Why would the Isotopes try out a new hot dog with branded paper? The fact that the branding on the paper reflected Albuquerque instead of Springfield showed a company trying to cut corners; however, unbranded hot dog wrappers would have been cheaper and kept the Albuquerque secret better.
H.K. Duff asks for two bottles of "smooth, untainted Duff." Immediately after, Duffman brings in two cans of Duff. While this isn't a huge difference, some beer drinkers claim there is a difference in taste between beer in cans versus beer in bottles. This is especially relevant to the additive H.K. duff wants to have Homer try.