Version:           unspecified (using KDE 4.5.1) 
OS:                Linux

This bug has been copied over from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=597635

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1) I right-click on the device notifier icon on the panel
and select "Beállítások" (Settings) from the menu.
2) I select the second icon from the top in the left pane:
"Eszközműveletek" (Actions)
3) Now in the right, I see actions like
"Megnyitás a fájlkezelővel" (open with file manager).
I select an action and click on the middle button "Szerkesztés"
(Edit) below.

At this point, the desktop darkens and the items on the desktop
(panels, widgets on the desktop etc) become unresponsive.
No switching to minimized window, no logout, KDE menu unavailable.
Only the window manager actions remain: eg moving/resizing windows,
using the icons on windows, switching to another displayed window.

A new dialog appears where one can edit the actions.
By closing the dialog, the desktop returns to normal color and
the widgets are responsive again.
But if I minimize the dialog window, I don't see any way to return,
so I am stuck with a hardly usable desktop.

In my opinion, making the desktop widgets unresponsive
is a critical bug because they are essential for using the system
(starting applications, logging out, switching between applications 
etc).

Best wishes,

	Gábor Braun

Reproducible: Always