Program: 45583
Project: 45583
Buggy source:
/** 
 * Note: this disables focus traversal keys for the canvas it creates.
 */
void attachViewCanvas(JPanel panel){
  rb=ClientContextJME.getWorldManager().getRenderManager().createRenderBuffer(RenderBuffer.Target.ONSCREEN,width,height);
  ClientContextJME.getWorldManager().getRenderManager().addRenderBuffer(rb);
  final Canvas canvas=((OnscreenRenderBuffer)rb).getCanvas();
  canvas.setVisible(true);
  canvas.setBounds(0,0,width,height);
  canvas.setFocusTraversalKeysEnabled(false);
  panel.addComponentListener(new ComponentListener(){
    public void componentResized(    ComponentEvent e){
      logger.fine("String_Node_Str" + e);
      int width=e.getComponent().getWidth();
      int height=e.getComponent().getHeight();
      float aspectRatio=(float)width / (float)height;
      canvas.setBounds(0,0,width,height);
      cameraComponent.setViewport(width,height);
      cameraComponent.setAspectRatio(aspectRatio);
      viewProperties.setFieldOfView(viewProperties.getFieldOfView());
    }
    public void componentMoved(    ComponentEvent e){
    }
    public void componentShown(    ComponentEvent e){
    }
    public void componentHidden(    ComponentEvent e){
    }
  }
);
  Window w=SwingUtilities.getWindowAncestor(panel);
  if (w != null) {
    w.addWindowListener(new WindowAdapter(){
      @Override public void windowDeiconified(      WindowEvent e){
        ClientContextJME.getWorldManager().getRenderManager().setRunning(true);
      }
      @Override public void windowIconified(      WindowEvent e){
        ClientContextJME.getWorldManager().getRenderManager().setRunning(false);
      }
    }
);
  }
  final Semaphore waitForReady=new Semaphore(0);
  rb.setBufferUpdater(new BufferUpdater(){
    public void init(    RenderBuffer arg0){
      logger.info("String_Node_Str");
      waitForReady.release();
      canvas.setIgnoreRepaint(true);
    }
  }
);
  panel.add(canvas,BorderLayout.CENTER);
  canvas.repaint();
  try {
    waitForReady.acquire();
  }
 catch (  InterruptedException ex) {
    Logger.getLogger(ViewManager.class.getName()).log(Level.SEVERE,null,ex);
  }
  createCameraEntity(ClientContextJME.getWorldManager());
  listener=new CellListener();
}

Fixed version (ground truth):
/** 
 * Note: this disables focus traversal keys for the canvas it creates.
 */
void attachViewCanvas(JPanel panel){
  rb=ClientContextJME.getWorldManager().getRenderManager().createRenderBuffer(RenderBuffer.Target.ONSCREEN,width,height);
  ClientContextJME.getWorldManager().getRenderManager().addRenderBuffer(rb);
  final Canvas canvas=((OnscreenRenderBuffer)rb).getCanvas();
  canvas.setVisible(true);
  canvas.setBounds(0,0,width,height);
  canvas.setFocusTraversalKeysEnabled(false);
  panel.addComponentListener(new ComponentListener(){
    public void componentResized(    ComponentEvent e){
      logger.fine("String_Node_Str" + e);
      int width=e.getComponent().getWidth();
      int height=e.getComponent().getHeight();
      float aspectRatio=(float)width / (float)height;
      canvas.setBounds(0,0,width,height);
      cameraComponent.setViewport(width,height);
      cameraComponent.setAspectRatio(aspectRatio);
      viewProperties.setFieldOfView(viewProperties.getFieldOfView());
    }
    public void componentMoved(    ComponentEvent e){
    }
    public void componentShown(    ComponentEvent e){
    }
    public void componentHidden(    ComponentEvent e){
    }
  }
);
  Window w=SwingUtilities.getWindowAncestor(panel);
  if (w != null) {
    w.addWindowListener(new WindowAdapter(){
      @Override public void windowDeiconified(      WindowEvent e){
        ClientContextJME.getWorldManager().getRenderManager().setRunning(true);
      }
      @Override public void windowIconified(      WindowEvent e){
        ClientContextJME.getWorldManager().getRenderManager().setRunning(false);
      }
    }
);
  }
  final Semaphore waitForReady=new Semaphore(0);
  rb.setBufferUpdater(new BufferUpdater(){
    public void init(    RenderBuffer arg0){
      logger.info("String_Node_Str");
      waitForReady.release();
    }
  }
);
  panel.add(canvas,BorderLayout.CENTER);
  canvas.repaint();
  try {
    waitForReady.acquire();
  }
 catch (  InterruptedException ex) {
    Logger.getLogger(ViewManager.class.getName()).log(Level.SEVERE,null,ex);
  }
  createCameraEntity(ClientContextJME.getWorldManager());
  listener=new CellListener();
}