Custom paper size causes QGraphicsScene::render to misbehave on Mac

#include <QtGui>

int main(int argc, char **argv) {
  QApplication app(argc, argv);

  QGraphicsScene scene;
  scene.addRect(0., 0., 800., 600., QPen(), QBrush(Qt::BDiagPattern));

  QGraphicsView view(&scene);
  view.show();

  QPrinter printer(QPrinter::HighResolution);
  printer.setPaperSize(QSizeF(8.5, 11.), QPrinter::Inch);
  printer.setPageMargins(1., 1., 1., 1., QPrinter::Inch);

  QPrintDialog dialog(&printer, &view);
  if (dialog.exec() == QDialog::Accepted) {
    QPainter painter(&printer);
    scene.render(&painter);
  }

  return app.exec();
}