From 57b18edb559ea4dbaff3b89177492bf99ad2a4a3 Mon Sep 17 00:00:00 2001
From: Flavio Copes <copesc@gmail.com>
Date: Fri, 18 Sep 2015 14:13:23 +0200
Subject: [PATCH] Fix saving array fields

---
 system/src/Grav/Common/Data/Blueprint.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/system/src/Grav/Common/Data/Blueprint.php b/system/src/Grav/Common/Data/Blueprint.php
index 9d0960606..15cdce65c 100644
--- a/system/src/Grav/Common/Data/Blueprint.php
+++ b/system/src/Grav/Common/Data/Blueprint.php
@@ -238,6 +238,9 @@ class Blueprint
 
             if ($rule) {
                 // Item has been defined in blueprints.
+                if (is_array($field) && count($field) == 1 && reset($field) == '') {
+                    continue;
+                }
                 $field = Validation::filter($field, $rule);
             } elseif (is_array($field) && is_array($val)) {
                 // Array has been defined in blueprints.