http://bugs.winehq.org/show_bug.cgi?id=30432
--- Comment #13 from Sebastian Lackner sebastian@fds-team.de --- My patch got upstream today, so this problem should be fixed with commit:
http://source.winehq.org/git/wine.git/patch/270d66efc74c11d86ea1c62d289c825a...
Which will be included in wine >= 1.7.21.