Corrected entry: When Amy is putting on make up with Penny's help, where Amy says "I'm going to video chat Sheldon" she is not wearing glasses. The shot moves to capture Penny's face and Amy is wearing glasses, then the next shot shows Amy is not wearing her glasses.
Corrected entry: At the end of the episode Sheldon's sat nav voice asks "Can you name the four state capitals that are not served by the interstate system?" In fact, there are five, according to the Interstate System's website. Juneau, Alaska; Dover, Delaware; Jefferson City, Missouri; Carson City, Nevada; and Pierre, South Dakota.Captain Defenestrator