http://bugs.winehq.org/show_bug.cgi?id=33147
--- Comment #5 from Stanisław Halik sthalik@misaki.pl 2013-03-12 11:02:10 CDT --- The issue is moot because ArmA 3 Alpha stopped working under Wine under strange circumstances. Had to migrate to a Windows VM, so won't be able to provide further testing.
Apparently steam's CDN has different MSI installers, some broken, some not, for different geodb locations, too.