diff -r b72c6db6890b -r 5dc02b23752f src/gui/dialogs/qdialog.cpp
--- a/src/gui/dialogs/qdialog.cpp	Wed Jun 23 19:07:03 2010 +0300
+++ b/src/gui/dialogs/qdialog.cpp	Tue Jul 06 15:10:48 2010 +0300
@@ -258,7 +258,7 @@
 
 QDialog::QDialog(QWidget *parent, Qt::WindowFlags f)
     : QWidget(*new QDialogPrivate, parent,
-              f | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0))
+              f | ((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : Qt::WindowType(0)))
 {
 #ifdef Q_WS_WINCE
     if (!qt_wince_is_smartphone())
@@ -295,7 +295,7 @@
   \internal
 */
 QDialog::QDialog(QDialogPrivate &dd, QWidget *parent, Qt::WindowFlags f)
-    : QWidget(dd, parent, f | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0))
+    : QWidget(dd, parent, f | ((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : Qt::WindowType(0)))
 {
 #ifdef Q_WS_WINCE
     if (!qt_wince_is_smartphone())
@@ -641,13 +641,14 @@
     while (w && w->whatsThis().size() == 0 && !w->testAttribute(Qt::WA_CustomWhatsThis))
         w = w->isWindow() ? 0 : w->parentWidget();
     if (w) {
-        QMenu p(this);
-        QAction *wt = p.addAction(tr("What's This?"));
-        if (p.exec(e->globalPos()) == wt) {
+        QWeakPointer<QMenu> p = new QMenu(this);
+        QAction *wt = p.data()->addAction(tr("What's This?"));
+        if (p.data()->exec(e->globalPos()) == wt) {
             QHelpEvent e(QEvent::WhatsThis, w->rect().center(),
                          w->mapToGlobal(w->rect().center()));
             QApplication::sendEvent(w, &e);
         }
+        delete p.data();
     }
 #endif
 }