http://bugs.winehq.org/show_bug.cgi?id=18440
--- Comment #12 from Luca Bennati lucak3@gmail.com 2011-11-16 15:55:53 CST --- (In reply to comment #11)
Very first thing to do is figure out what font is that, and why gmBlackBoxY is set to 0 for that particular glyph.
Family is Han Mon A, style Regular, format is GGO_GRAY4_BITMAP. Available also at vietunicode.sourceforge.net/fonts/fonts_hannom.html.
Glyphs that seems to be problematic (gmBlackBoxY == 0) are 0x3000 and 0x20, as noted in bug 20847.
Confirming hackfix by adding said check and assignment (gmBlackBoxY to 1) in get_glyph_outline before "switch(format)".