Index: library/Zend/Session/SessionManager.php
===================================================================
--- library/Zend/Session/SessionManager.php	(date 1312884853000)
+++ library/Zend/Session/SessionManager.php	(revision )
@@ -84,14 +84,16 @@
     /**
      * Start session
      *
-     * if No sesion currently exists, attempt to start it. Calls 
-     * {@link isValid()} once session_start() is called, and raises an 
+     * if No sesion currently exists, attempt to start it. Calls
+     * {@link isValid()} once session_start() is called, and raises an
      * exception if validation fails.
-     * 
+     *
+     * @param bool $preserveStorage        If set to true, current session storage will not be overwritten by the 
+     *                                     contents of $_SESSION.
      * @return void
      * @throws Exception
      */
-    public function start()
+    public function start($preserveStorage = false)
     {
         if ($this->sessionExists()) {
             return;
@@ -107,7 +109,9 @@
         if ($storage instanceof Storage\SessionStorage
             && $_SESSION !== $storage
         ) {
+            if(!$preserveStorage){
-            $storage->fromArray($_SESSION);
+                $storage->fromArray($_SESSION);
+            }
             $_SESSION = $storage;
         }
     }
@@ -257,9 +261,7 @@
             session_regenerate_id();
             return $this;
         }
-        $this->destroy();
         session_regenerate_id();
-        $this->start();
         return $this;
     }
 
@@ -384,19 +386,12 @@
             return;
         }
 
-        if ($this->sessionExists()) {
-            $this->destroy(array('send_expire_cookie' => false));
+        // Set new cookie TTL
+        $config->setCookieLifetime($ttl);
 
-            // Since a cookie was destroyed, we should regenerate the ID
+        if ($this->sessionExists()) {
+            // There is a running session so we'll regenerate id to send a new cookie
             $this->regenerateId();
         }
-
-        // Now simply set the cookie TTL
-        $config->setCookieLifetime($ttl);
-
-        if (!$this->sessionExists()) {
-            // Restart session if necessary
-            $this->start();
-        }
-    }
+    }
+}
-}