http://bugs.winehq.org/show_bug.cgi?id=13393
--- Comment #12 from Vincent Povirk madewokherd@gmail.com 2009-11-27 10:56:37 --- Wineboot --end-session still closes running programs in other desktops. This can be verified by running:
"wine explorer /desktop=x,640x480 wineboot --end-session"
However, it seems that for some reason pressing the close button on the virtual desktop no longer runs wineboot --end-session, even though from reading the explorer code it should.