FULL PRODUCT VERSION :
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode)

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

A DESCRIPTION OF THE PROBLEM :
Modifiers of ActionEvent are wrong if a ContainerListener is present.
This is because ActionEvent is constructed with modifiers of current event in event queue. Usually it's the MouseEvent, but in case a ContainerListener exists - it's the ContainerEvent!

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
The following code reproduces it. Notice the modifiers of the ActionEvent are 0 but supposed to be 16.

import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JPopupMenu;
import javax.swing.JMenuItem;
import javax.swing.JButton;
import javax.swing.JDialog;
import java.awt.event.ContainerListener;
import java.awt.event.ContainerEvent;

public class test3 {
    public static void main(String[] args) {
        final JPopupMenu menu = new JPopupMenu();
        JMenuItem item = new JMenuItem("menu item 1");
        item.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    System.out.println("modifiers: " + e.getModifiers());
                }
            });
        menu.add(item);

        final JButton btn = new JButton("button 1");
        btn.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    Rectangle r = btn.getBounds();
                    menu.show(btn, r.x, r.y + r.height);
menu.getParent().addContainerListener(new ContainerListener() {
public void componentAdded(ContainerEvent e) {
}

public void componentRemoved(ContainerEvent e) {
}

});
                }
            });

        JDialog dlg = new JDialog();
        dlg.getContentPane().add(btn);
        dlg.pack();
        dlg.setVisible(true);
    }

}


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
the modifiers printing should be 16
ACTUAL -
modifiers printing is 0

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JPopupMenu;
import javax.swing.JMenuItem;
import javax.swing.JButton;
import javax.swing.JDialog;
import java.awt.event.ContainerListener;
import java.awt.event.ContainerEvent;

public class test3 {
    public static void main(String[] args) {
        final JPopupMenu menu = new JPopupMenu();
        JMenuItem item = new JMenuItem("menu item 1");
        item.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    System.out.println("modifiers: " + e.getModifiers());
                }
            });
        menu.add(item);

        final JButton btn = new JButton("button 1");
        btn.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    Rectangle r = btn.getBounds();
                    menu.show(btn, r.x, r.y + r.height);
menu.getParent().addContainerListener(new ContainerListener() {
public void componentAdded(ContainerEvent e) {
}

public void componentRemoved(ContainerEvent e) {
}

});
                }
            });

        JDialog dlg = new JDialog();
        dlg.getContentPane().add(btn);
        dlg.pack();
        dlg.setVisible(true);
    }

}

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