There have been one or two others who've cited this before on 1125's. In both cases it only happened when really working the engine. There is a seal between the pump impeller and the oil side of the engine so I suppose its possible for oil to get by this seal. If it was just a drip or two id keep a close eye on it and your engine fluids. One person even took a piece of paper towel and tapped it over the hole rode it hard for awhile to verify the fluid and if that was where it was coming from.