Index: modules/node/node.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.module,v
retrieving revision 1.947.2.5
diff -u -r1.947.2.5 node.module
--- modules/node/node.module	27 Mar 2008 08:03:02 -0000	1.947.2.5
+++ modules/node/node.module	2 Apr 2008 13:19:22 -0000
@@ -1032,7 +1032,7 @@
   // First we'll overwrite the existing node teaser and body with
   // the filtered copies! Then, we'll stick those into the content
   // array and set the read more flag if appropriate.
-  $node->readmore = $node->teaser != $node->body;
+  $node->readmore = $node->body && ($node->teaser != $node->body);
 
   if ($teaser == FALSE) {
     $node->body = check_markup($node->body, $node->format, FALSE);