commit 5effc1c728f35ba42f7f6de531ce19d984f04835
Author: Erik Stielstra <info@erikstielstra.nl>
Date:   Sat Dec 29 12:00:29 2012 +0100

    #5

diff --git a/core/modules/locale/locale.batch.inc b/core/modules/locale/locale.batch.inc
index 3a58fe7..a8be3d7 100644
--- a/core/modules/locale/locale.batch.inc
+++ b/core/modules/locale/locale.batch.inc
@@ -43,6 +43,7 @@ function locale_translation_batch_status_fetch_remote($source, &$context) {
       // store the resulting uri. If a file is not found we don't update the
       // file object, and store it unchanged.
       if (isset($result['last_modified'])) {
+        $remote_file->uri = isset($result['location']) ? $result['location'] : $remote_file->uri;
         $remote_file->timestamp = $result['last_modified'];
         $source->files[LOCALE_TRANSLATION_REMOTE] = $remote_file;
       }
@@ -444,9 +445,17 @@ function locale_translation_http_check($uri) {
   $request = drupal_container()->get('http_default_client')->head($uri);
   try {
     $response = $request->send();
-    return array(
-      'last_modified' => $response->getLastModified() ? strtotime($response->getLastModified()) : 0,
-    );
+    $result = array();
+
+    // In case of a redirected response, return the last file location.
+    if ($previous = $response->getPreviousResponse()) {
+      if ($previous->isRedirect()) {
+        $result['location'] = $previous->getLocation();
+      }
+    }
+
+    $result['last_modified'] = $response->getLastModified() ? strtotime($response->getLastModified()) : 0;
+    return $result;
   }
   catch (BadResponseException $e) {
     if ($response = $e->getResponse()) {