http://bugs.winehq.org/show_bug.cgi?id=30647
--- Comment #2 from Alexandre Julliard julliard@winehq.org 2012-05-11 09:43:50 CDT --- The goal is to make sure the same dir can't be used by multiple users, since that's not supported. If you really know what you're doing you can create a prefix under your home with symlinks to the shared folder.