diff -r ef0373b55136 -r 758a864f9613 src/gui/kernel/qapplication.cpp
--- a/src/gui/kernel/qapplication.cpp	Fri Sep 17 08:34:18 2010 +0300
+++ b/src/gui/kernel/qapplication.cpp	Mon Oct 04 01:19:32 2010 +0300
@@ -474,7 +474,7 @@
 static int drag_time = 500;
 #ifdef Q_OS_SYMBIAN
 // The screens are a bit too small to for your thumb when using only 4 pixels drag distance.
-static int drag_distance = 8;
+static int drag_distance = 12;
 #else
 static int drag_distance = 4;
 #endif
@@ -1055,6 +1055,18 @@
     QApplicationPrivate::is_app_closing = true;
     QApplicationPrivate::is_app_running = false;
 
+    // delete all widgets
+    if (QWidgetPrivate::allWidgets) {
+        QWidgetSet *mySet = QWidgetPrivate::allWidgets;
+        QWidgetPrivate::allWidgets = 0;
+        for (QWidgetSet::ConstIterator it = mySet->constBegin(); it != mySet->constEnd(); ++it) {
+            register QWidget *w = *it;
+            if (!w->parent())                        // window
+                w->destroy(true, true);
+        }
+        delete mySet;
+    }
+
     delete qt_desktopWidget;
     qt_desktopWidget = 0;
 
@@ -1075,18 +1087,6 @@
     delete QWidgetPrivate::mapper;
     QWidgetPrivate::mapper = 0;
 
-    // delete all widgets
-    if (QWidgetPrivate::allWidgets) {
-        QWidgetSet *mySet = QWidgetPrivate::allWidgets;
-        QWidgetPrivate::allWidgets = 0;
-        for (QWidgetSet::ConstIterator it = mySet->constBegin(); it != mySet->constEnd(); ++it) {
-            register QWidget *w = *it;
-            if (!w->parent())                        // window
-                w->destroy(true, true);
-        }
-        delete mySet;
-    }
-
     delete QApplicationPrivate::app_pal;
     QApplicationPrivate::app_pal = 0;
     delete QApplicationPrivate::sys_pal;
@@ -2540,6 +2540,13 @@
         sendSpontaneousEvent(w, &activationChange);
     }
 
+#ifdef QT_MAC_USE_COCOA
+    // In case the user clicked on a child window, we need to
+    // reestablish the stacking order of the window so
+    // it pops in front of other child windows in cocoa:
+    qt_cocoaStackChildWindowOnTopOfOtherChildren(window);
+#endif
+
     for(int i = 0; i < toBeDeactivated.size(); ++i) {
         QWidget *w = toBeDeactivated.at(i);
         sendSpontaneousEvent(w, &windowDeactivate);
@@ -5791,10 +5798,12 @@
 #ifndef QT_NO_GESTURES
 QGestureManager* QGestureManager::instance()
 {
-    QApplicationPrivate *qAppPriv = QApplicationPrivate::instance();
-    if (!qAppPriv->gestureManager)
-        qAppPriv->gestureManager = new QGestureManager(qApp);
-    return qAppPriv->gestureManager;
+    if (QApplicationPrivate *qAppPriv = QApplicationPrivate::instance()) {
+        if (!qAppPriv->gestureManager)
+            qAppPriv->gestureManager = new QGestureManager(qApp);
+        return qAppPriv->gestureManager;
+    }
+    return 0;
 }
 #endif // QT_NO_GESTURES