Index: modules/taxonomy/taxonomy.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/taxonomy/taxonomy.module,v
retrieving revision 1.440
diff -u -p -r1.440 taxonomy.module
--- modules/taxonomy/taxonomy.module	9 Nov 2008 00:58:03 -0000	1.440
+++ modules/taxonomy/taxonomy.module	9 Nov 2008 19:01:32 -0000
@@ -1089,7 +1089,7 @@ function _taxonomy_term_select($title, $
   $options = array();
 
   if ($blank) {
-    $options[''] = $blank;
+    $options[0] = $blank;
   }
   if ($tree) {
     foreach ($tree as $term) {