OK, those bits at the end have a glass material applied to them, so you're actually seeing through to the contour of the cutout - look closely and you'll see the shape matches what you can see on the opposite side.
I do see what tobian is talking about now though - because the light covers are inset and have a bigger rounding radius than on the hull itself, there is a slight wobble when the glass meets the hull. When it's textured you won't be able to see it unless you get really close so I'm not concerned about that at all - there are definitely no mesh/smoothing errors in that area though as far as I can tell