Program: 4093
Project: 4093
Buggy source:
public DownloadTable(EventList<DownloadItem> downloadItems){
  super(new DownloadTableModel(downloadItems));
  setRolloverEnabled(false);
  setFocusable(false);
  setEditable(true);
  setShowGrid(false,false);
  setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  setHighlighters(HighlighterFactory.createSimpleStriping());
  final DownloadRendererEditor editor=new DownloadRendererEditor();
  editor.initializeEditor(downloadItems);
  DownloadRendererEditor renderer=new DownloadRendererEditor();
  setDefaultEditor(DownloadItem.class,editor);
  setDefaultRenderer(DownloadItem.class,renderer);
  setRowHeight(renderer.getPreferredSize().height);
  addMouseMotionListener(new MouseMotionAdapter(){
    @Override public void mouseMoved(    MouseEvent e){
      Component component=getComponentAt(e.getPoint());
      if (component instanceof JTable) {
        JTable table=(JTable)component;
        int col=table.columnAtPoint(e.getPoint());
        int row=table.rowAtPoint(e.getPoint());
        table.editCellAt(row,col);
      }
    }
  }
);
  addMouseListener(new MouseAdapter(){
    @Override public void mouseExited(    MouseEvent e){
      TableCellEditor editor=getCellEditor();
      Component component=e.getComponent();
      if (editor != null && component != editor) {
        if (component == null || component.getComponentAt(e.getPoint()) != editor) {
          editor.cancelCellEditing();
        }
      }
    }
  }
);
}

Fixed version (ground truth):
public DownloadTable(EventList<DownloadItem> downloadItems){
  super(new DownloadTableModel(downloadItems));
  setRolloverEnabled(false);
  setFocusable(false);
  setEditable(true);
  setShowGrid(false,false);
  setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  setHighlighters(HighlighterFactory.createSimpleStriping());
  final DownloadRendererEditor editor=new DownloadRendererEditor();
  editor.initializeEditor(downloadItems);
  DownloadRendererEditor renderer=new DownloadRendererEditor();
  setDefaultEditor(DownloadItem.class,editor);
  setDefaultRenderer(DownloadItem.class,renderer);
  setRowHeight(renderer.getPreferredSize().height);
  addMouseMotionListener(new MouseMotionAdapter(){
    @Override public void mouseMoved(    MouseEvent e){
      Component component=getComponentAt(e.getPoint());
      if (component instanceof JTable) {
        JTable table=(JTable)component;
        int col=table.columnAtPoint(e.getPoint());
        int row=table.rowAtPoint(e.getPoint());
        table.editCellAt(row,col);
      }
    }
  }
);
  addMouseListener(new MouseAdapter(){
    @Override public void mouseExited(    MouseEvent e){
      TableCellEditor editor=getCellEditor();
      Component component=e.getComponent();
      if (editor != null && component != editor) {
        if (component == null || component.getComponentAt(e.getPoint()) != editor) {
          editor.cancelCellEditing();
        }
      }
    }
    @Override public void mouseReleased(    MouseEvent e){
      maybeShowPopup(e);
    }
    @Override public void mousePressed(    MouseEvent e){
      maybeShowPopup(e);
    }
    private void maybeShowPopup(    MouseEvent e){
      if (e.isPopupTrigger()) {
        editor.showPopup(e.getComponent(),e.getX(),e.getY());
      }
    }
  }
);
}