Bug 117071 MembersOrderPreferenceCache leaking a propertyChangeListener
20051109 org.eclipse.jdt.ui.PreferenceConstants#initializeDefaultValues adds a listener to JDT UI preference store but this is not deleted before shutdown.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/PreferenceConstants.java
public static final String EDITOR_SEMANTIC_HIGHLIGHTING_BOLD_SUFFIX=".bold"; 
	/**
	 * A named preference suffix that controls if semantic highlighting has the text attribute italic.
	 * <p>
	 * Value is of type <code>Boolean</code>: <code>true</code> if italic.
	 * </p>
	 * 
	 * @since 3.0
	 */
	public static final String EDITOR_SEMANTIC_HIGHLIGHTING_ITALIC_SUFFIX=".italic"; 
	
	/**
	 * A named preference suffix that controls if semantic highlighting has the text attribute strikethrough.
	 * <p>
	 * Value is of type <code>Boolean</code>: <code>true</code> if strikethrough.
	 * </p>
	 * 
	 * @since 3.1
	 */
	public static final String EDITOR_SEMANTIC_HIGHLIGHTING_STRIKETHROUGH_SUFFIX=".strikethrough"; 
	
	/**
	 * A named preference suffix that controls if semantic highlighting has the text attribute underline.
	 * <p>
	 * Value is of type <code>Boolean</code>: <code>true</code> if underline.
	 * </p>
	 * 
	 * @since 3.1
	 */
	public static final String EDITOR_SEMANTIC_HIGHLIGHTING_UNDERLINE_SUFFIX=".underline";