I noticed this and took a picture myself. I won't worry about it, though.
We had a few consecutive days last week where it was REALLY foggy and I even had some condensation in my headlight. Is that abnormal? It went away when the humidity finally went down.
2012 FF Ti HB Kona Blue, Built 5/24/2011, 401A + Ti Handling Package, Parking Technology Package, Winter Package, Moonroof, and MFT w/NAV at v3.6 89k miles and counting...