Index: library/Zend/Locale/Format.php
===================================================================
--- library/Zend/Locale/Format.php	(revision 22512)
+++ library/Zend/Locale/Format.php	(working copy)
@@ -1130,34 +1130,34 @@
         $options = self::_checkOptions($options) + self::$_options;
 
         // day expected but not parsed
-        if ((iconv_strpos($options['date_format'], 'd', 0, 'UTF-8') !== false) and (!isset($date['day']) or ($date['day'] == ""))) {
+        if ((iconv_strpos($options['date_format'], 'd', 0, 'UTF-8') !== false) and (!isset($date['day']) or ((string)$date['day'] == ""))) {
             return false;
         }
 
         // month expected but not parsed
-        if ((iconv_strpos($options['date_format'], 'M', 0, 'UTF-8') !== false) and (!isset($date['month']) or ($date['month'] == ""))) {
+        if ((iconv_strpos($options['date_format'], 'M', 0, 'UTF-8') !== false) and (!isset($date['month']) or ((string)$date['month'] == ""))) {
             return false;
         }
 
         // year expected but not parsed
         if (((iconv_strpos($options['date_format'], 'Y', 0, 'UTF-8') !== false) or
-             (iconv_strpos($options['date_format'], 'y', 0, 'UTF-8') !== false)) and (!isset($date['year']) or ($date['year'] == ""))) {
+             (iconv_strpos($options['date_format'], 'y', 0, 'UTF-8') !== false)) and (!isset($date['year']) or ((string)$date['year'] == ""))) {
             return false;
         }
 
         // second expected but not parsed
-        if ((iconv_strpos($options['date_format'], 's', 0, 'UTF-8') !== false) and (!isset($date['second']) or ($date['second'] == ""))) {
+        if ((iconv_strpos($options['date_format'], 's', 0, 'UTF-8') !== false) and (!isset($date['second']) or ((string)$date['second'] == ""))) {
             return false;
         }
 
         // minute expected but not parsed
-        if ((iconv_strpos($options['date_format'], 'm', 0, 'UTF-8') !== false) and (!isset($date['minute']) or ($date['minute'] == ""))) {
+        if ((iconv_strpos($options['date_format'], 'm', 0, 'UTF-8') !== false) and (!isset($date['minute']) or ((string)$date['minute'] == ""))) {
             return false;
         }
 
         // hour expected but not parsed
         if (((iconv_strpos($options['date_format'], 'H', 0, 'UTF-8') !== false) or
-             (iconv_strpos($options['date_format'], 'h', 0, 'UTF-8') !== false)) and (!isset($date['hour']) or ($date['hour'] == ""))) {
+             (iconv_strpos($options['date_format'], 'h', 0, 'UTF-8') !== false)) and (!isset($date['hour']) or ((string)$date['hour'] == ""))) {
             return false;
         }
         return true;