=== modified file 'modules/taxonomy.module'
--- modules/taxonomy.module	
+++ modules/taxonomy.module	
@@ -507,6 +507,9 @@
     $c = db_query(db_rewrite_sql("SELECT v.* FROM {vocabulary} v INNER JOIN {vocabulary_node_types} n ON v.vid = n.vid WHERE n.type = '%s' ORDER BY v.weight, v.name", 'v', 'vid'), $node->type);
 
     while ($vocabulary = db_fetch_object($c)) {
+      if ($vocabulary->module != 'taxonomy') {
+        continue;
+      }
       if ($vocabulary->tags) {
         $typed_terms = array();
         foreach ($terms as $term) {