I'm working on a pair of heels in Blender 2.69 and for some reason this dark line appears in the upper part near the toes. There's a lesser crease on the side of the shoe which you can also see here. Can't figure out why it's there. There's no deformation in the mesh. I've deleted that area and reformed it, and it's still there. Anybody got any idea of what's going on here?