QPainterPath::addText has incorrect font spacing on Windows only

#include <QtGui>
#include <QFont>

class MyWidget : public QWidget {
public:
  MyWidget(QWidget *parent = NULL) : QWidget(parent) {
    setFixedSize(100, 100);
  }

protected:
  void paintEvent(QPaintEvent *) {
    QFont f;
    f.setFamily("Arial");
    f.setPixelSize(11);

    QPainterPath path;
    path.addText(50, 50, f, "wiwi");

    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);
    painter.setBrush(Qt::SolidPattern);
    painter.setPen(Qt::NoPen);
    painter.drawPath(path);

    painter.setFont(f);
    painter.setBrush(Qt::NoBrush);
    painter.setPen(Qt::SolidLine);
    painter.drawText(50, 70, "wiwi");
  }
};

int main(int argc, char **argv) {
  QApplication app(argc, argv);
  MyWidget w;
  w.show();
  return app.exec();
}

moveTo QPointF(51.7778, 50) 
lineTo QPointF(50.0322, 44.2959) 
lineTo QPointF(51.0312, 44.2959) 
lineTo QPointF(51.939, 47.5884) 
lineTo QPointF(52.2773, 48.813) 
quadTo QPointF(52.2988, 48.7217) QPointF(52.5728, 47.6367) 
lineTo QPointF(53.4805, 44.2959) 
lineTo QPointF(54.4741, 44.2959) 
lineTo QPointF(55.3281, 47.6045) 
lineTo QPointF(55.6128, 48.6948) 
lineTo QPointF(55.9404, 47.5938) 
lineTo QPointF(56.918, 44.2959) 
lineTo QPointF(57.8579, 44.2959) 
lineTo QPointF(56.0747, 50) 
lineTo QPointF(55.0703, 50) 
lineTo QPointF(54.1626, 46.584) 
lineTo QPointF(53.9424, 45.6118) 
lineTo QPointF(52.7876, 50)