Program: 4009
Project: 4009
Buggy source:
public DownloadSettingsPanel(){
  super(new BorderLayout());
  this.setPreferredSize(new Dimension(getPreferredSize().width,34));
  Painter painter=new SubpanelPainter();
  setBackgroundPainter(painter);
  pauseAllButton=new JButton(pauseAction);
  resumeAllButton=new JButton(resumeAction);
  clearFinishedButton=new JButton(clearAction);
  categorizeCheckBox=new CustomCheckBox(categorizeAction);
  titleLabel=new HeadingLabel(I18n.tr("String_Node_Str"));
  FontUtils.changeSize(titleLabel,5);
  FontUtils.changeStyle(titleLabel,Font.PLAIN);
  categorizeCheckBox.setOpaque(false);
  categorizeCheckBox.setForeground(Color.WHITE);
  FontUtils.changeStyle(categorizeCheckBox,Font.PLAIN);
  searchBar=downloadMediator.getFilterTextField();
  searchBar.setPreferredSize(new Dimension(150,19));
  categorizeAction.setEnabled(true);
  GridBagConstraints gbc=new GridBagConstraints();
  JPanel buttonPanel=new JPanel(new FlowLayout());
  buttonPanel.setOpaque(false);
  buttonPanel.add(pauseAllButton);
  buttonPanel.add(resumeAllButton);
  Insets insets=new Insets(5,5,5,5);
  JXPanel titlePanel=new JXPanel(new GridBagLayout());
  titlePanel.setOpaque(false);
  gbc.gridx=0;
  gbc.gridy=0;
  gbc.weightx=.5;
  gbc.insets=insets;
  gbc.fill=GridBagConstraints.NONE;
  gbc.anchor=GridBagConstraints.LINE_START;
  titlePanel.add(titleLabel,gbc);
  JPanel restPanel=new JPanel();
  restPanel.setOpaque(false);
  gbc.gridx++;
  gbc.gridy=0;
  gbc.insets=insets;
  restPanel.add(categorizeCheckBox,gbc);
  gbc.gridx++;
  gbc.gridy=0;
  gbc.insets=insets;
  restPanel.add(clearFinishedButton,gbc);
  gbc.gridx++;
  gbc.gridy=0;
  gbc.insets=insets;
  gbc.anchor=GridBagConstraints.LINE_END;
  restPanel.add(searchBar,gbc);
  add(titlePanel,BorderLayout.WEST);
  add(restPanel,BorderLayout.EAST);
}

Fixed version (ground truth):
public DownloadSettingsPanel(){
  super(new BorderLayout());
  this.setPreferredSize(new Dimension(getPreferredSize().width,34));
  Painter painter=new SubpanelPainter();
  setBackgroundPainter(painter);
  pauseAllButton=new JButton(pauseAction);
  resumeAllButton=new JButton(resumeAction);
  clearFinishedButton=new JXButton(clearAction);
  categoriseCheckBox=new CustomCheckBox(categorizeAction);
  clearFinishedButton.setBackgroundPainter(new ButtonPainter());
  clearFinishedButton.setOpaque(false);
  clearFinishedButton.setForeground(Color.WHITE);
  clearFinishedButton.setFont(new Font("String_Node_Str",Font.PLAIN,10));
  clearFinishedButton.setBorderPainted(false);
  clearFinishedButton.setPreferredSize(new Dimension((int)clearFinishedButton.getPreferredSize().getWidth(),21));
  titleLabel=new HeadingLabel(I18n.tr("String_Node_Str"));
  FontUtils.changeSize(titleLabel,5);
  FontUtils.changeStyle(titleLabel,Font.PLAIN);
  categoriseCheckBox.setOpaque(false);
  categoriseCheckBox.setForeground(Color.WHITE);
  FontUtils.changeStyle(categoriseCheckBox,Font.PLAIN);
  searchBar=downloadMediator.getFilterTextField();
  searchBar.setPreferredSize(new Dimension(150,19));
  categorizeAction.setEnabled(true);
  GridBagConstraints gbc=new GridBagConstraints();
  JPanel buttonPanel=new JPanel(new FlowLayout());
  buttonPanel.setOpaque(false);
  buttonPanel.add(pauseAllButton);
  buttonPanel.add(resumeAllButton);
  Insets insets=new Insets(5,5,5,5);
  JXPanel titlePanel=new JXPanel(new GridBagLayout());
  titlePanel.setOpaque(false);
  gbc.gridx=0;
  gbc.gridy=0;
  gbc.weightx=.5;
  gbc.insets=insets;
  gbc.fill=GridBagConstraints.VERTICAL;
  gbc.anchor=GridBagConstraints.LINE_START;
  titlePanel.add(titleLabel,gbc);
  JPanel restPanel=new JPanel();
  restPanel.setOpaque(false);
  gbc.anchor=GridBagConstraints.NORTH;
  gbc.gridx++;
  gbc.gridy=0;
  gbc.insets=insets;
  restPanel.add(categoriseCheckBox,gbc);
  gbc.anchor=GridBagConstraints.SOUTH;
  gbc.gridx++;
  gbc.gridy=0;
  gbc.insets=insets;
  restPanel.add(clearFinishedButton,gbc);
  gbc.gridx++;
  gbc.gridy=0;
  gbc.insets=insets;
  gbc.anchor=GridBagConstraints.LINE_END;
  restPanel.add(searchBar,gbc);
  add(titlePanel,BorderLayout.WEST);
  add(restPanel,BorderLayout.EAST);
}