When the Simpsons are thrown out of Springfield, while riding in a car there is dialogue between Lisa and Homer. Lisa asks "Dad, where are we going? Do we have a plan?", while she is asking this question her necklace is white but right after that for a couple of seconds it is orange, just like the one Marge wears.
When Homer and Marge break into their Springfield house, there is police tape that they break away to enter the house. The tape is not visible the rest of the time Homer and Marge are there.
When the Simpsons are in their storm cellar discussing what they could do in the currently vacant town and Homer says "And, I could drive drunk while I'm actually sober!", hovering over Maggie's gas mask (hanging on the back wall, farthest to the right,) you can see a slightly reduced duplicate of Grampa's left ear and glasses lens.