--- common.inc	2014-05-16 09:59:22.825965210 -0700
+++ common-new.inc	2014-05-16 09:59:51.464557446 -0700
@@ -6430,14 +6430,16 @@
   // Filter out properties from the element, leaving only children.
   $children = array();
   $sortable = FALSE;
-  foreach ($elements as $key => $value) {
-    if ($key === '' || $key[0] !== '#') {
-      $children[$key] = $value;
-      if (is_array($value) && isset($value['#weight'])) {
-        $sortable = TRUE;
-      }
-    }
-  }
+	if ( ! empty($elements) ){
+		foreach ($elements as $key => $value) {
+			if ($key === '' || $key[0] !== '#') {
+				$children[$key] = $value;
+				if (is_array($value) && isset($value['#weight'])) {
+					$sortable = TRUE;
+				}
+			}
+		}
+	}
   // Sort the children if necessary.
   if ($sort && $sortable) {
     uasort($children, 'element_sort');