FULL PRODUCT VERSION :
java version "1.6.0-rc"
Java(TM) SE Runtime Environment (build 1.6.0-rc-b104)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b104, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
The right-facing arrow icon on submenus (or pullout menus; JMenus attached to a JMenu) is not painted as disabled when the submenu is disabled; i.e., it remains black rather than being painted gray. This is true for both Windows classic and XP.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached program. Compare the disabled submenu to a standard Windows app.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expected arrow to be gray, like the text.
ACTUAL -
Arrow is still black.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import javax.swing.*;

public class MenuTest2
{

    // Public data ////////////////////////////////////////////////////////
    
    // Public methods /////////////////////////////////////////////////////

    public static void main(final String[] args)
        throws Exception
    {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

        JMenuBar menubar = new JMenuBar();
        final JMenu fileMenu = new JMenu("File");
        final JMenu submenu1 = new JMenu("Enabled");
        final JMenu submenu2 = new JMenu("Disabled");
        submenu2.setEnabled(false);
        fileMenu.add(submenu1);
        fileMenu.add(submenu2);
        menubar.add(fileMenu);
        
        JFrame frame = new JFrame("Menu Test");
        frame.setJMenuBar(menubar);
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        JPanel panel = new JPanel(new FlowLayout());
        panel.setPreferredSize(new Dimension(300, 200));
        frame.getContentPane().add(panel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Run with WinLAF.