http://bugs.winehq.org/show_bug.cgi?id=23192
--- Comment #5 from Ruslan b7.10110111@gmail.com 2010-06-17 15:30:35 --- (In reply to comment #4)
Does mathematica use gdiplus.dll? If so can you try to set it to native (so you need a native dll)? Likely it will be rendered correctly then. If that's the case it is a gdiplus bug.
Yes, when i set gdiplus as 'native, builtin', Mathematica loads its own version of the dll, Mathematica\7.0\SystemFiles\FrontEnd\Binaries\Windows\gdiplus.dll, and rendering becomes correct.