--- import_html_process.inc.orig	2010-02-14 17:08:48.000000000 +0100
+++ import_html_process.inc	2010-02-23 01:36:36.000000000 +0100
@@ -1425,6 +1425,11 @@
         $old_node-> $key = $value;
       }
     }
+    if (isset($old_node->teaser) && !isset($node->teaser)) {
+      // There's still old teaser content lingering around which hasn't been cleaned yet. Reset properties.
+      unset($old_node->teaser);
+      $old_node->teaser_include = TRUE;
+    }
     $node = $old_node;
   }
   else {