Small pool of oil in the airbox

I was checking out my air filter today and noticed a small pool of oil in the bottom, I'd say it's less that 1/2 a tsp of oil. Its one of those no toil pre oiled filters. I did read that some bikes get oil in their airbox from dropping the bike, unfortunately I've done that a few times as well as a pretty good crass 2 weeks ago where the bike was sliding upside down So I'm thinking it may be from the crank case breather but really just wondering if this happened to anyone else for piece of mind.

Thanks.

Click me <-- could be this?

Yeah I saw that thread before I posted this one. I don't think it's the same thing but I'm going to take some pictures later today and post them up here.

Thanks for the help though.