Bug 53010 Editor preferences do not take effect on open editors
I-20040224 Go to the Java > Editor > Syntax preference page. Change the keyword color to red. Press Ok. At this point, we use to see the preview update. Not on this build (problem #1). Press Ok, and close the pref dialog. The java editor that was already open did not update. I had to close it and reopen it for the colors to take effect (problem #2)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
* Creates and returns the preference store for this Java editor with the given input.
	 *
	 * @param input The editor input for which to create the preference store
	 *
	 * @since 3.0
	 */
	private IPreferenceStore createNewPreferenceStore(IEditorInput input) {
		List stores= new ArrayList(3);
		IJavaProject project= EditorUtility.getJavaProject(input);
		if (project != null)
			stores.add(new OptionsAdapter(project.getOptions(false), JavaPlugin.getDefault().getMockupPreferenceStore(), new OptionsAdapter.IPropertyChangeEventFilter() {
				public boolean isFiltered(PropertyChangeEvent event) {
					IJavaElement inputJavaElement= getInputJavaElement();
					IJavaProject javaProject= inputJavaElement != null ? inputJavaElement.getJavaProject() : null;
					if (javaProject == null)
						return true;
					
					return !javaProject.getProject().equals(event.getSource());
				}
				
			}));
		
		JavaTextTools tools= JavaPlugin.getDefault().getJavaTextTools();
		stores.add(tools.getPreferenceStore());
		if (tools.getCorePreferenceStore() != null)
			stores.add(new PreferencesAdapter(tools.getCorePreferenceStore()));
		
		if (stores.size() == 1)
			return (IPreferenceStore) stores.get(0);