--- drupal-4.6.3/modules/node.module	2005-08-11 08:54:17.000000000 -0400
+++ drupal-4.6.3/modules/node.module.new	2006-03-18 14:30:39.000000000 -0500
@@ -514,7 +514,7 @@ function node_view($node, $teaser = FALS
  * Apply filters to a node in preparation for theming.
  */
 function node_prepare($node, $teaser = FALSE) {
-  $node->readmore = (strlen($node->teaser) < strlen($node->body));
+  $node->readmore = $teaser && (strlen($node->teaser)) && (strlen($node->teaser) < strlen($node->body));
   if ($teaser == FALSE) {
     $node->body = check_output($node->body, $node->format);
   }