FULL PRODUCT VERSION :
java version "1.6.0-beta2"
Java(TM) SE Runtime Environment (build 1.6.0-beta2-b86)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b86, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
Linux pandora 2.6.15-1-686-smp #2 SMP Mon Mar 6 15:34:50 UTC 2006 i686 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
JList view is not updated when a window, keeping the focus, is covering the Java application totally or only a part.

However, that only happens if I reproduce the cenario above and change to other GNOME workspace, befor the JList is updated. I tested with another window manager (ION), and the result was the same.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- Open a X terminal and run the test program.
- Click on the "View" button.
- Maximize the X terminal, hiding the Java application window.
- Keep the focus on X terminal and switch to other GNOME workspace. (I tested on GNOME and ION window manager).
- Wait for the thread updates the JList (10s on current implementation).


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The list of itens in JLIst should be refreshed, displaying only the new itens.
ACTUAL -
There is a mix of itens, i.e., the removed itens are still showed together with the new ones, but you can not select the removed itens.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

import java.util.Iterator;
import java.util.Map;
import java.util.HashMap;
import java.util.UUID;
import javax.swing.JFrame;

/**
 *
 * @author Bruno Oliveira Silvestre
 */
public class HostInfo extends JFrame {
    
    private class Timer extends Thread {
    
        private HostInfo hInfo;
        private Map jobs;

        /** Creates a new instance of Timer */
        public Timer(HostInfo hInfo) {
            this.hInfo = hInfo;
            this.jobs = new HashMap();
            UUID uuid = UUID.randomUUID();
            jobs.put(uuid, uuid);
        }

        private void showJobs() {
            String[] str = new String[jobs.size()];
            Iterator iter = jobs.keySet().iterator();
            int i = 0;
            while (iter.hasNext()) {
                UUID uuid = (UUID) iter.next();
                str[i] = uuid.toString();
                i++;
            }
            hInfo.setJobs(str);
        }

        public void run() {
            try {
                Thread.sleep(10000); // 10 seconds
                showJobs();
            }
            catch(Exception e) {

            }
        }
    }
    
    private Timer timer;
    
    /** Creates new form Executor */
    public HostInfo() {
        initComponents();
        String[] jobs = new String[5];
        for(int i = 0; i < jobs.length; i++) {
            UUID uuid = UUID.randomUUID();
            jobs[i] = uuid.toString();
        }
        setJobs(jobs);
        timer = new Timer(this);
        timer.start();
    }
        
    public void setJobs(String[] jobs) {
        System.out.println("Setting job list: " + jobs.length);
        listJobs.setListData(jobs);
    }
        
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">
    private void initComponents() {
        jPanel2 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        listJobs = new javax.swing.JList();
        jPanel1 = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("HostInfo");
        setName("frameExecutor");
        jPanel2.setLayout(new java.awt.BorderLayout());

        jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder(javax.swing.BorderFactory.createEtchedBorder(), "Jobs"));
        jPanel2.setPreferredSize(new java.awt.Dimension(396, 200));
        listJobs.setFont(new java.awt.Font("Dialog", 0, 12));
        jScrollPane1.setViewportView(listJobs);

        jPanel2.add(jScrollPane1, java.awt.BorderLayout.CENTER);

        jButton1.setText("View");
        jPanel1.add(jButton1);

        jPanel2.add(jPanel1, java.awt.BorderLayout.SOUTH);

        getContentPane().add(jPanel2, java.awt.BorderLayout.CENTER);

        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-413)/2, (screenSize.height-202)/2, 413, 202);
    }// </editor-fold>
    
   
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JList listJobs;
    // End of variables declaration
    

    public static void main(String[] args) {
        HostInfo host = new HostInfo();
        host.setVisible(true);
    }
}
---------- END SOURCE ----------