While Bart is playing on his Xbox 360 in his room before the electricity goes out, we can see him using a Xbox 360-controller which is white. After they changed scene, we can see the same controller he used laying next to him in bed, which is now a Xbox-controller in black and with a different layout then the Xbox 360-controller.
When Homer and Lisa were talking about global warming, the cup in homer hands has the word "Ned" which appear and disappear between shots.