SVN commit 1198195 by gokcen:

Backport r1179175 to fix bug #255340 in KDE 4.5 too.

 M  +4 -0      controllerwindow.cpp  


--- branches/KDE/4.5/kdebase/workspace/plasma/desktop/shell/controllerwindow.cpp #1198194:1198195
@@ -156,6 +156,10 @@
 
 void ControllerWindow::setGraphicsWidget(QGraphicsWidget *widget)
 {
+    if (m_graphicsWidget == widget) {
+        return;
+    }
+
     if (m_graphicsWidget) {
         m_graphicsWidget->removeEventFilter(this);
         if (m_graphicsWidget == m_widgetExplorer) {