Index: node_export.module
===================================================================
--- node_export.module	9 May 2009 02:36:31 -0000	1.1.2.1
+++ node_export.module	22 Jun 2009 23:56:27 -0000
@@ -67,9 +67,12 @@ function node_export_access($node) {
   return $access;
 }
 
+/**
+ * Determines if a node type is allowed to be exported, and exists.
+ **/
 function node_export_is_permitted($type) {
   $omitted = variable_get('node_export_omitted', array());
-  return empty($omitted[$type]);
+  return empty($omitted[$type]) && node_get_types('name', (object) array('type' => $type)) != FALSE;
 }
 
 /**