Reverse Polarity, black and white wires, the connections are reversed.
The importance of home inspections for new homes is evident in this picture. The Hamilton home inspection uncovered reverse polarity, unfortunately it was not just one outlet, but ,the entire master bedroom and hall. Reverse polarity is an electrical safety issue if you small appliance wiring is faulty, electrical shock is the implication. The home inspector noted that the house was 7 years old.