Index: ckeditor/includes/ckeditor.utils.js
===================================================================
--- ckeditor/includes/ckeditor.utils.js	(revision 8004)
+++ ckeditor/includes/ckeditor.utils.js	(working copy)
@@ -106,8 +106,8 @@
   if (teaser) {
     var ch_checked = teaser.checkbox.attr('checked');
     var tv = teaser.textarea.val();
-    if (!teaser.textarea.attr("disabled")) {
-      $("#" + textarea_id).val(tv + '\n<!--break-->\n' + $("#" + textarea_id).val());
+    if (teaser.checkbox.length > 0 && !teaser.textarea.attr("disabled")) {
+      $("#" + textarea_id).val(tv + '\n<!--break-->[This one--utils]\n' + $("#" + textarea_id).val());
       teaser.textarea.val('');
     }