Bug 63351 [Navigator] Import/ExportResourcesAction not removed as listeners of selection service
Open and closing the navigator view, these actions are leaked. It would appear that the dispose for these actions is not getting called?
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/MainActionGroup.java
toggleLinkingAction.setToolTipText(
			ResourceNavigatorMessages.getString("ToggleLinkingAction.toolTip")); 
		toggleLinkingAction.setImageDescriptor(getImageDescriptor("elcl16/synced.gif"));
	}
	
	/**
	 * Makes the sub action groups.
	 */
	protected void makeSubGroups() {
		gotoGroup = new GotoActionGroup(navigator);
		openGroup = new OpenActionGroup(navigator);
		refactorGroup = new RefactorActionGroup(navigator);
		IPropertyChangeListener workingSetUpdater = new IPropertyChangeListener() {
			public void propertyChange(PropertyChangeEvent event) {
				String property = event.getProperty();
				
				if (WorkingSetFilterActionGroup.CHANGE_WORKING_SET.equals(property)) {
					IResourceNavigator navigator = getNavigator();
					Object newValue = event.getNewValue();
					
					if (newValue instanceof IWorkingSet) {	
						navigator.setWorkingSet((IWorkingSet) newValue);
					}
					else 
					if (newValue == null) {
						navigator.setWorkingSet(null);
					}
				}
			}
		};