http://bugs.winehq.org/show_bug.cgi?id=23277
--- Comment #11 from Ken Sharp imwellcushtymelike@gmail.com --- The earliest I could find is build 227. https://web.archive.org/web/20101228171757/http://www.metatrader4.com/files/... f6d9fd62eb68acfb25d169caab3fde43c653223e mt4-227.exe
Around Wine 10.2 (workaround Bug 57950) the icons look good.
If you have Wine Stable (10.0) installed, can you retry with that?