Now I'm asking one! Was doing a job for a customer, swapping outlets due to room color change. Pulled 1 outlet and noticed 1 black and 2 neutrals. Thought that a bit odd so I turned power back on and tested the circuit. Black/ground 120VAC. Pulled the neutrals off and measured white to ground for 1@120VAC, 1@0VAC. So I have a hot neutral. However, in the configuration as wired, even with a hot neutral, plugging a light into either outlet side, worked the light and nothing tripped? Customer told me never had a problem. What's up?