The Japanese YN fandom is going on and on about a possible 0.04 and 0.06 leak that is supposedly on some kind of disk… I… think? My Japanese is actually pretty bad, so I'm not sure if I'm even interpreting this all correctly.http://iss.ndl.go.jp/books/R100000002-I000008005629-00
^ This seems to be something quite a few people are linking to.https://twitter.com/ladybird0426
^ This guy is talking a lot about the older versions, though I'm having a rough time understanding him.
This could all just be a red herring, so I wouldn't get your hopes up, but maybe someone with better Japanese could comb through this stuff and see if it's anything worthwhile?
(pic related; it's supposedly a beta map.)