I thank you deeply for your offer. Right now, the current state of it is really weird, making me wonder if it was ever really fixed in the first place (as Life of Riley claimed to have done), so your help is especially desirable. At this moment, the images as linked to by the English Wikipedia's Masyu article show the proper license and attribution when clicked on. However, the images were duplicated for the German article on the puzzle, and the unsolved-puzzle image there when clicked on shows "public domain" as its license. (The solved version seems correct.) This is where it gets weird - if I click "Erstellen" on that file, I see code for a description that should be correct, implying the description was already fixed but that the article is linked to an older version of the file. I can't seem to find that older version anywhere apart from clicking the image in the article. Going to edit the article itself doesn't reveal anything to me in the code that would make it seem "frozen in time", so I have no idea how this is happening. My best guess is that the files' descriptions were simply changed to what they should be, in a manner that lets the old versions still be referenced (as is happening now on the German article). That should not be even possible, and what I want is for that to not be possible, on any language's Wikipedia. I have no idea what that would entail.

If you can't figure it out either, then what I would ask for is to have all four files nuked from orbit deleted entirely so that no further distribution of them with the wrong licensing is possible.

I don't know how much you can do given this affects a foreign-language Wikipedia, but whatever you can, or at least any insight you could provide as to how this is even occurring in the first place, would be greatly appreciated.
- ZM