Contextkey does not work in Nimbus

FULL PRODUCT VERSION :
java version "1.6.0_13"
Java(TM) SE Runtime Environment (build 1.6.0_13-b03)
Java HotSpot(TM) Server VM (build 11.3-b02, mixed mode)

(same error in 1.6.0_14)


ADDITIONAL OS VERSION INFORMATION :
Linux kurt-ubuntu 2.6.27-14-generic #1 SMP Fri Mar 13 18:00:20 UTC 2009 i686 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
ImageMap for RootPane.ancestorInputMap is not set in Nimbus - so the Contextkey is not working.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
try the testprogram


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Dialog.ModalityType;

import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JPopupMenu;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.WindowConstants;

import ui.UIUtils;

import com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel;

public class ContextMenuKeyNotWorkingInNimbus {
  public static void main(final String[] args) {

    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        try {
          // UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
          // UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
          // UIManager.setLookAndFeel(MetalLookAndFeel.class.getName());
          // UIManager.setLookAndFeel(GTKLookAndFeel.class.getName());
          UIManager.setLookAndFeel(NimbusLookAndFeel.class.getName());
        } catch (final Exception e) {
          e.printStackTrace();
        }
      }
    });

    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        UIUtils.checkUI();
        final JPopupMenu pum = new JPopupMenu("pum");
        pum.add("first item");
        final String title = "ContextMenu-error";
        final JDialog d = new JDialog(null, title, ModalityType.DOCUMENT_MODAL);
        d.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        final JComponent jc =
          new JTextArea("current L&F: " + UIManager.getLookAndFeel().getName()
            + "\nContext-Menu-Key produces no context menu in Nimbus-L&F"
            + "\nworks fine with Metal-L&F");
        jc.setComponentPopupMenu(pum);
        d.getContentPane().add(jc);
        d.pack();
        d.setVisible(true);
      }
    });
  }
}

---------- END SOURCE ----------