exactly! if it gets worse, just send it in.Is there something here I'm not seeing? If that tiny, barely visible unless you look for it crack is the only problem you got with your Lite, you should be happy. As far as I know it doesn't affect the hinge in anyway and is only a cosmetic problem, and very small one at that. Dead pixels or faulty diagonals could be what your getting with your new Lite.
small cosmetic problems lead to bigger issues over time... a small rust spot on a car can lead to the entire panel corroding.
