--- taxonomy_filter.module.orig	2009-05-29 23:12:45.000000000 +0200
+++ taxonomy_filter.module	2009-06-22 16:23:31.000000000 +0200
@@ -453,7 +453,7 @@
   }
   $joins .= " INNER JOIN {node} n ON tn.nid = n.nid";
   $wheres .= ' AND n.status = 1 AND n.moderate = 0';
-  $group = ' GROUP BY td.tid';
+  $group = ' GROUP BY td.tid, td.vid, td.name, td.weight';
   $order = ' ORDER BY vid, weight, name';
 
   $sql = $select . $joins . $wheres . $group . $order;