http://bugs.winehq.org/show_bug.cgi?id=10430
--- Comment #7 from Vitaliy Margolen vitaliy@kievinfo.com 2007-11-17 15:45:40 --- You might have a broken fontforge version (there are number of broken versions of it). Try to downgrade it. Or use the version that you had before.
Wine uses it's own font - marlett for those button symbols. And it did happen before when fontforge was corrupting output fonts.