http://bugs.winehq.org/show_bug.cgi?id=11751
--- Comment #6 from knan-wine@anduin.net 2008-09-13 18:57:16 --- That's interesting.
- winetricks riched20 makes it die earlier inside the app itself, and not even come up with the textbox for input. - winetricks riched30 acts like wine builtin. But richedit fixmes disappear, so it's using native.
So not a richedit bug as such, then. (apart from text actually being visible with native and not with builtin, but that's another bug)