QMainWindow::restoreGeometry() doesn't work on dual onitor

QMaindWindow::restoreGeometry() does not work correct if QMainWindow is maximized on secondary monitor.

This can be reproduced with following example on window vista.

#include <QtGui>
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{

QLabel *label = new QLabel("Please move the window position on second screen and maximiz and then close,Then restart the app", this);
label->setAlignment(Qt::AlignCenter);
setCentralWidget(label);
QSettings settings("MyCompany", "MyApp");
restoreGeometry(settings.value("Geometry/MainWindow").toByteArray());
}

void MainWindow::closeEvent(QCloseEvent *e)
{
QSettings settings("MyCompany", "MyApp");
settings.setValue("Geometry/MainWindow", saveGeometry());
QMainWindow::closeEvent(e);
}