The legs of Amy's Spandex costume disappear when Leela has her in a headlock
As Fry leaves Panucci's Pizzeria to deliver his last pizza, the clock on the wall shows 11:35. He arrives at Applied Cryogenics and it is clearly dark. He sits at the table and looking out the window, we see it is night. He toasts the next "lousy millennium". In the very next frames, we see the Earth from space along with audio of the new year countdown. The problem is, New New York is fully illuminated by the sun. If it's midnight, it should be dark.
At the end while Seymour is waiting he lays down presumably to pass away due to old age but all the way through the cloning process the remains are stood up.
Fry said that he's going to show Bender how he lived before he met him, yet this was already seen in 'Luck of the Fryish'.
The score on the TV shows 2nd quarter Wisconsin 9 Stanford 3, however, the actual half-time score was Stanford 9 Wisconsin 3. Wisconsin's first touchdown didn't come until the third quarter.