I thought I had fixed an earlier mix-up problem with Skins, but there still seem to be a way to get into that.
I'm not sure yet about how to reproduce it, but there're seem to be two ways to fix this:
- Quit and kill app (by showing open tasks and then choosing the wiggling ND1 icon), and try to select Dark again
- Go into the Apple Settings app ("Einstellungen" in German) on app page one of your device, find ND1, and change the default skin to "Dark"; then, back in the app, select "Default", which is shown there for sure
My Skin is always the "Custom" skin. Black and Light are downloaded and hard-wired. That is, you cannot change them and they cannot get lost either (only the menu item to select can, temporarily, or so it appears).
Sorry about the inconvenience.