The price tag at the back of Homer's fez suddenly appears, lengthens, then disappears. After this, it appears and disappears repeatedly again, often in the same shot.
During the mid-credits final gag, Lisa tells Homer about her class having an all-you-can-eat spaghetti dinner. At this point, Maggie is sitting beside Lisa, but when the camera cuts to Homer, Maggie is sitting across from Lisa on the opposite side of the table.
Upon Lisa wishing for world peace, the scene at the UN shows reconciliation between England and Argentina. However since England has not been an independent country since 1707 and since that year been a constituent country of the United Kingdom, the place card should read "United Kingdom", not "England".
At one point in Bart's nightmare, Sherri and Terri have yellow skin like most of the Simpsons characters instead of their usual pale skin.
When the Moroccan salesman tries to warn Homer Simpson, saying "You'll be sorry", his lips don't move.
When Moe says, "Enslave humanity, will ya?", his mouth doesn't move.