Qt::Drawer kills key-events

#include <QtGui/QApplication>
#include <QMainWindow>
#include <QLineEdit>

class MainWindow : public QMainWindow {
public:
	MainWindow(QWidget *parent = 0) : QMainWindow(parent) {
		setCentralWidget(new QLineEdit(this));
		new QWidget(this, Qt::Drawer);
	}
};

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	MainWindow w;
	w.show();
	return a.exec();
}