Index: includes/fivestar.field.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/fivestar/includes/fivestar.field.inc,v
retrieving revision 1.4
diff -u -p -r1.4 fivestar.field.inc
--- includes/fivestar.field.inc	11 Dec 2010 16:03:56 -0000	1.4
+++ includes/fivestar.field.inc	29 Jan 2011 00:16:30 -0000
@@ -21,9 +21,12 @@ function fivestar_field_info() {
 }
 
 function fivestar_form_field_ui_field_edit_form_alter(&$form, $form_state) {
-  // Multiple is not supported with Fivestar.
-  $form['field']['cardinality']['#access'] = FALSE;
-  $form['field']['cardinality']['#value'] = 1;
+  $field = $form['#field'];
+  if ($field['type'] == 'fivestar') {
+    // Multiple is not supported with Fivestar.
+    $form['field']['cardinality']['#access'] = FALSE;
+    $form['field']['cardinality']['#value'] = 1;
+  }
 }
 
 /**