http://bugs.winehq.org/show_bug.cgi?id=58914
--- Comment #4 from Rafał Mużyło galtgendo@o2.pl --- A semi-random stab in the dark, but you might check bug 58932 - description seems unrelated, but perhaps it's a hit anyway, given that it can't be a missing font problem (after all, *you* would know if that was the case).
But if this is an even older problem, you might wanna define 'for a long time' a bit better, as in 'did it ever worked properly in wine ?'.
Still 'string not fitting allocated space, therefore getting rejected, instead of cropped' seems most promising research route.
As a side note: why does this program effectively hardcode its installation path not only in its installer, but also in the program itself ?