http://bugs.winehq.org/show_bug.cgi?id=9880
--- Comment #3 from Alexandre Julliard julliard@winehq.org 2007-10-03 13:34:49 --- Yes it's a bug, multiple X displays in the same session are not support at the moment. You may be able to work around it by explicitly starting a new desktop on the second display, something like 'explorer /desktop=foo myapp.exe'.