Bug 48364 PreferenceDialog can reopen empty
20031209 When you close the Preferences dialog with an entry other than the default selected you will get an empty entry in the dialog when you reopen STEPS 1) Open the preferences dialog 2) Select the Appearances page 3) Close the dialog 4) Reopen - Workbench will be selected and the contents will be empty
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
private Image errorMsgImage;
	/**
	 * The Help button; <code>null</code> if none.
	 */
	private Button helpButton = null;
	/**
	 * Indicates whether help is available; <code>false</code> by default.'
	 *
	 * @see #setHelpAvailable
	 */
	private boolean isHelpAvailable = false;
	private Point lastShellSize;
	private IPreferenceNode lastSuccessfulNode;
	private String message = ""; 
	private Image messageImage;
	private CLabel messageLabel;
	/**
	 * The minimum page size; 400 by 400 by default.
	 *
	 * @see #setMinimumPageSize
	 */
	private Point minimumPageSize = new Point(400, 400);
	private Color normalMsgAreaBackground;
	/**
	 * The OK button.
	 */
	private Button okButton;
	/**
	 * The Composite in which a page is shown.
	 */