diff -r 8a227e403f35 showtodos/src/org/netbeans/modules/showtodos/TodoAnnotationProvider.java
--- a/showtodos/src/org/netbeans/modules/showtodos/TodoAnnotationProvider.java	Mon Apr 05 15:43:42 2010 -0400
+++ b/showtodos/src/org/netbeans/modules/showtodos/TodoAnnotationProvider.java	Thu Apr 08 14:43:40 2010 +0200
@@ -85,7 +85,7 @@
 
    public void annotate(Line.Set lines, Lookup context) {
       final DataObject dataObj = context.lookup(DataObject.class);
-      if (dataObj == null) {
+      if (dataObj == null || dataObj.getCookie(EditorCookie.class) == null) {
          // Nothing to do
          return;
       }