http://bugs.winehq.org/show_bug.cgi?id=13633
--- Comment #2 from A Wine user RandomAccountName@mail.com 2010-03-07 12:57:19 --- I just tested this bug in 1.1.40 with VLC 0.8.6i (the option appears to be gone from recent versions of VLC) and I can't reproduce it from random dragging. The only time the window disappears is when trying to drag it so that part of the window would be beyond the edge of the screen, but this may be a window manager bug - behavior is inconsistent between WMs and it doesn't happen in a virtual desktop, or if "allow the window manager to control the windows" is disabled.