Index: content.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/cck/content.module,v
retrieving revision 1.301.2.52
diff -u -p -r1.301.2.52 content.module
--- content.module	12 Sep 2008 14:33:12 -0000	1.301.2.52
+++ content.module	14 Sep 2008 05:45:41 -0000
@@ -1550,7 +1550,7 @@ function content_allowed_values($field) 
       $opt = content_filter_xss($opt);
       if (strpos($opt, '|') !== FALSE) {
         list($key, $value) = explode('|', $opt);
-        $allowed_values[$field['field_name']][$key] = $value ? $value : $key;
+        $allowed_values[$field['field_name']][$key] = (isset($value) && $value !=='') ? $value : $key;
       }
       else {
         $allowed_values[$field['field_name']][$opt] = $opt;