I was just trying to bake a normal map for this mask model. The scene looks as follows:
With nothing unusual going on.
I try to test out the scene using cycles, but even without applying the normal map, I get this bizarre noise:
It looks like the sun light is throwing wrong shadows on the edges, as some of the splotches (though not all) go away when I turn off shadows. I'm thinking there is a problem with the settings for this mesh, though I can't find anything out of the ordinary.