I love Klondike and would be willing to overlook a lot if I had a tin with any imperfections. You do see these types of stains in tin paper where the tobacco has had contact over a long period of time (among other factors). Paper products often have small flaws because it's a natural material. Could the fractal-like quality be in the substrate, and exposed by the transfer of the tobacco oil/moisture? Enjoy the Klondike, and maybe do some Dunhill Flake comparison to set my mind at ease that they are comparable.