http://bugs.winehq.org/show_bug.cgi?id=5865
------- Additional Comments From hans@it.vu.nl 2007-25-02 02:57 ------- The reason is that fontconfig uses a different heuristic to determine if a font supports a given Unicode character. That means we would not match Windows output 100% which in turn can result in subtle bugs.
A proper solution would be to grovel through the font tables ourselves and write a conformance test to ensure we match Windows exactly.