Goof on the money
Howard's mail, his driver's license, and his library card all say he's from Marshington, D.C. However, if you look at the one dollar bill from his wallet, it clearly says Washington. They changed George Washington into a duck, they changed it to United States of Anatidae (whatever that is), but they didn't change the Washington D.C. right under the serial number. Whoops!
I want the doctor to take your picture so I can look at you from inside as well.