When a swing application is full screen or split screen by pushing 
the application against the top or side of the screen respectively, 
the menus become unusable. What happens is that a menu collapses
immediately after releasing the mouse button. i.e., a user cannot 
use the menu unless the window is dragged from a full- or split 
screen state. Please look at the bottom for a simple test program 
that reproduces the problem. Also, this YouTube movie shows the
problem: http://www.youtube.com/watch?v=noq6OhuWPQA

The bug is present in Sun's Java 1.6 and 1.7, but not in OpenJDK 1.6.
I already submitted a bug report at Sun. Should I also report this 
bug for gnome-shell (as the problem might be in there?).


An extremely simple test program that reproduces the problem:

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.SwingUtilities;


public class Main {

       public static void main(String[] args) {

               SwingUtilities.invokeLater(new Runnable(){
                       @Override
                       public void run() {
                               JFrame f = new JFrame();
                               JMenuBar jmb = new JMenuBar();
                               JMenu jm = new JMenu("File");
                               jm.add(new JMenuItem("New"));
                               jmb.add(jm);
                               f.setJMenuBar(jmb);
                               f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                               f.setSize(800, 600);
                               f.setVisible(true);
                       }

               });
       }
}