I agree with Max, looks like a casting defect ! To be sure, clean the area thoroghly with alcohol, take it down the road for a few miles (hiway speeds would be best) and check it again. It maybe such a minute leak that it won't show up for a couple of runs. If you take it to the dealer be sure you have your pics with you, I'm sure they'll try to wrangle out of replacing the casting.

Just my Dos Centavos !