http://bugs.winehq.org/show_bug.cgi?id=11026
--- Comment #3 from Dmitry Timoshkov dmitry@codeweavers.com 2008-01-04 02:56:22 --- (In reply to comment #0)
On KDE, both the main window and the keywords window look like they are active. If you start typing, the letters go into the keywords window, but if you press Alt + F4, the main window closes. (and the tool window with it)
The above looks like a KDE bug. On Alt+F4 it should send a WM_DELETE_WINDOW event to a window with keyboard focus.