diff --git includes/form.inc includes/form.inc
index 82835a7..0d0352c 100644
--- includes/form.inc
+++ includes/form.inc
@@ -1185,13 +1185,15 @@ function form_get_errors() {
  */
 function form_get_error($element) {
   $form = form_set_error();
-  $key = $element['#parents'][0];
+  $key = array_shift($element['#parents']);
   if (isset($form[$key])) {
     return $form[$key];
   }
-  $key = implode('][', $element['#parents']);
-  if (isset($form[$key])) {
-    return $form[$key];
+  foreach ($element['#parents'] as $parent) {
+    $key .= '][' . $parent;
+    if (isset($form[$key])) {
+      return $form[$key];
+    }
   }
 }