Unusual crease

I render this scene with yaf(a)ray, and an unusual crease shows up, its lit only by a HDRI image, and i tried rotating the image, but its not that, i made sure the background is set smooth, but thats not it. its definately not thw mesh.

Hm, I can’t really see what the problem is, could you maybe email me that tiny portion of the mesh, just split it from the rest. That way I don’t get the whole model. Just the area where you are having problems…or else do a closeup render.

I bet you have a duplicate vertex somewhere. Have you tried remove doubles?

maybe, go in edit mode, ctrl v> remove doubles??
not sure though

you can always just Photoshop it off