JMenu content doesn't show up on second click

Question

Hello evryone,
I have a weird behaviour with JMenu's.
When I click on my help menu, and choose the "About" menu item, i show a JDialog with an ok button. So far everything is fine.
But when i click on the Help menu a second time and scroll down the mouse for an item, the menu disapears. If i go to another one, go to an item and then go to the help menu again, then it works.
I thought at the first time it was a JDK bug, but it seems stupid, since everyone does that (open a JDialog from a menuitem). I looked over on the internet to find this kind of behavior, but didn't find anything.
I dont't know if you guys need any code ...
Thanks a lot for your time.
C�dric.
PS : using JDK 1.4.2_05

Answer 1

Ok then. I thought someone might have had that before ...
My menu :
public class RssMenuBar extends JMenuBar
        //building the help menu
        //About Listener
        about.setActionCommand(ApplicationAction.OPEN_ABOUT);
        about.addActionListener(new AppMenuHandler());
        //filling the menu
        helpMenu.add(<other item>);
        helpMenu.add(about);
}The listener
public class AppMenuHandler implements ActionListener
    public void actionPerformed(ActionEvent e)
        if (<otherActions>.equals(e.getActionCommand())) {
        else if (ApplicationAction.OPEN_ABOUT.equals(e.getActionCommand())) {
            log.debug("begin showAbout");
            AboutDialog aboutDialog = new AboutDialog();
            aboutDialog.show();
            log.debug("end showAbout");
        else {
}The dialog
public class AboutDialog extends RootDialog
    public AboutDialog(JFrame owner)
        super(owner);
        setCancelVisible(false);
        this.setTitle(TITLE);
        init();
    private void init()
         ... //adding component in content pane
        //Finalize the dialog content
        this.pack();
        this.setLocationRelativeTo(RssMain.getInstance());
    public void okPressed()
        this.dispose();
}The root dialog (which adds two button (Ok and Cancel and provides convenient method to add component in its GridBagLayout)
public abstract class RootDialog extends JDialog implements ActionListener
    public RssDialog(JFrame owner)
        super(owner);
        init();
    private void init()
        //Finalize the dialog content
        this.getContentPane().add(panel);
        this.setResizable(false);
        this.setModal(true);
    public abstract void okPressed();
    public void cancelPressed()
        log.debug("Default cancel action. Only dispose the dialog");
        this.dispose();
    public void actionPerformed(ActionEvent e)
        if (e.getSource() == okButton)
            log.debug("Ok button has been pressed.");
            okPressed();
        else
            log.debug("Cancel button has been pressed.");
            cancelPressed();
}