Bug 170884 [open type] problem with incomplete results
20070118 It seems that sometimes no search matches are shown, only the history entries. - Open the dialog on a larger workspace - Quickly enter two characters and then remove the second one with backspace - You can see that the search is interrrupted at 60% and doesn't start again after the backspace - the result only contains history entries
bundles/org.eclipse.ui.ide.application/src/org/eclipse/ui/internal/ide/application/IDEWorkbenchAdvisor.java
* 
	 * @see org.eclipse.ui.application.WorkbenchAdvisor#postShutdown
	 */
	public void postShutdown() {
		if (activityHelper != null) {
			activityHelper.shutdown();
			activityHelper = null;
		}
		if (idleHelper != null) {
			idleHelper.shutdown();
			idleHelper = null;
		}
		if (workspaceUndoMonitor != null) {
			workspaceUndoMonitor.shutdown();
			workspaceUndoMonitor = null;
		}
		if (IDEWorkbenchPlugin.getPluginWorkspace() != null) {
			disconnectFromWorkspace();
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.application.WorkbenchAdvisor#preShutdown()
	 */
	public boolean preShutdown() {
		Display.getCurrent().removeListener(SWT.Settings,
				settingsChangeListener);
		return super.preShutdown();
	}