My quick an dirty (pun intended) experiment concluded that ntfs, while mounted on linux, is case-sensitive. Windows will happily list all files from fs in explorer, whatever case they are, but treat them as one. And this is deep in win32: http://i.imgur.com/sWnCMdq.png (that's cygwin, while on linux, I've put a `small` file in the `test` dir).