diff -r b72c6db6890b -r 5dc02b23752f src/gui/kernel/qapplication_win.cpp
--- a/src/gui/kernel/qapplication_win.cpp	Wed Jun 23 19:07:03 2010 +0300
+++ b/src/gui/kernel/qapplication_win.cpp	Tue Jul 06 15:10:48 2010 +0300
@@ -79,6 +79,7 @@
 #include "qlayout.h"
 #include "qtooltip.h"
 #include "qt_windows.h"
+#include "qscrollbar.h"
 #if defined(QT_NON_COMMERCIAL)
 #include "qnc_win.h"
 #endif
@@ -441,7 +442,7 @@
 #define __export
 #endif
 
-extern "C" LRESULT CALLBACK QtWndProc(HWND, UINT, WPARAM, LPARAM);
+extern "C" LRESULT QT_WIN_CALLBACK QtWndProc(HWND, UINT, WPARAM, LPARAM);
 
 class QETWidget : public QWidget                // event translator widget
 {
@@ -701,6 +702,21 @@
     QApplication::setPalette(menu, "QMenuBar");
 }
 
+static void qt_set_windows_updateScrollBar(QWidget *widget)
+{
+    QList<QObject*> children = widget->children();
+    for (int i = 0; i < children.size(); ++i) {
+        QObject *o = children.at(i);
+        if(!o->isWidgetType())
+            continue;
+        if (QWidget *w = static_cast<QWidget *>(o))
+            qt_set_windows_updateScrollBar(w);
+    }
+    if (qobject_cast<QScrollBar*>(widget))
+        widget->updateGeometry();
+}
+
+
 /*****************************************************************************
   qt_init() - initializes Qt for Windows
  *****************************************************************************/
@@ -1400,8 +1416,7 @@
             ;
 }
 
-extern "C"
-LRESULT CALLBACK QtWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
+extern "C" LRESULT QT_WIN_CALLBACK QtWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
     bool result = true;
     QEvent::Type evt_type = QEvent::None;
@@ -1579,6 +1594,10 @@
     case WM_MBUTTONDOWN:
     case WM_RBUTTONDOWN:
     case WM_XBUTTONDOWN:
+    case WM_LBUTTONDBLCLK:
+    case WM_RBUTTONDBLCLK:
+    case WM_MBUTTONDBLCLK:
+    case WM_XBUTTONDBLCLK:
         if (qt_win_ignoreNextMouseReleaseEvent)
             qt_win_ignoreNextMouseReleaseEvent = false;
         break;
@@ -1917,6 +1936,8 @@
                     QLocalePrivate::updateSystemPrivate();
                     if (!widget->testAttribute(Qt::WA_SetLocale))
                         widget->dptr()->setLocale_helper(QLocale(), true);
+                    QEvent e(QEvent::LocaleChange);
+                    QApplication::sendEvent(qApp, &e);
                 }
             }
             else if (msg.wParam == SPI_SETICONTITLELOGFONT) {
@@ -1927,6 +1948,15 @@
                     }
                 }
             }
+            else if (msg.wParam == SPI_SETNONCLIENTMETRICS) {
+                widget = (QETWidget*)QWidget::find(hwnd);
+                if (widget && !widget->parentWidget()) {
+                    qt_set_windows_updateScrollBar(widget);
+                    QEvent e(QEvent::LayoutRequest);
+                    QApplication::sendEvent(widget, &e);
+                }
+        }
+
             break;
 
         case WM_PAINT:                                // paint event
@@ -2279,7 +2309,7 @@
         case WM_GETOBJECT:
             {
                 // Ignoring all requests while starting up
-                if (QApplication::startingUp() || QApplication::closingDown() || (DWORD)lParam != OBJID_CLIENT) {
+                if (QApplication::startingUp() || QApplication::closingDown() || (LONG)lParam != OBJID_CLIENT) {
                     result = false;
                     break;
                 }
@@ -2560,6 +2590,17 @@
             break;
         }
 #endif // !defined(Q_WS_WINCE) || defined(QT_WINCE_GESTURES)
+#ifndef QT_NO_CURSOR
+        case WM_SETCURSOR: {
+            QCursor *ovr = QApplication::overrideCursor();
+            if (ovr) {
+                SetCursor(ovr->handle());
+                RETURN(TRUE);
+            }
+            result = false;
+            break;
+        }
+#endif
         default:
             result = false;                        // event was not processed
             break;
@@ -2982,7 +3023,10 @@
                 // most recent one.
                 msgPtr->lParam = mouseMsg.lParam;
                 msgPtr->wParam = mouseMsg.wParam;
-                msgPtr->pt = mouseMsg.pt;
+                // Extract the x,y coordinates from the lParam as we do in the WndProc
+                msgPtr->pt.x = GET_X_LPARAM(mouseMsg.lParam);
+                msgPtr->pt.y = GET_Y_LPARAM(mouseMsg.lParam);
+                ClientToScreen(msg.hwnd, &(msgPtr->pt));
                 // Remove the mouse move message
                 PeekMessage(&mouseMsg, msg.hwnd, WM_MOUSEMOVE,
                             WM_MOUSEMOVE, PM_REMOVE);