http://bugs.winehq.org/show_bug.cgi?id=6715
--- Comment #17 from Stephan Sokolow from_wine_bugzilla@ssokolow.com 2009-04-20 13:43:58 --- Yes. The first screenshot is how text is rendered more or less all the time. I've also noticed that some other visual novels with similar GUIs show horribly (almost unreadably) un-antialiased text instead.
(In other words, different results, but both appearing to be side-effects of something in Wine reducing an alpha blend to one-bit transparency)