Error occurred at Logout session

After upgrade to 1.1.1, I got error when I logout from a login session, here is the error:


Warning: session_regenerate_id() [<a href='function.session-regenerate-id'>function.session-regenerate-id</a>]: Session object destruction failed in \wwwroot\piwik\libs\Zend\Session.php on line 313

Here is the backtrace:


#0 Piwik_ErrorHandler(2, session_regenerate_id() [<a href='function.session-regenerate-id'>function.session-regenerate-id</a>]: Session object destruction failed, \wwwroot\piwik\libs\Zend\Session.php, 313, Array ([filename] => ,[linenum] => 0))#1 session_regenerate_id(1) called at [\wwwroot\piwik\libs\Zend\Session.php:313]#2 Zend_Session::regenerateId() called at [\wwwroot\piwik\plugins\Login\Controller.php:384]#3 Piwik_Login_Controller::clearSession() called at [\wwwroot\piwik\plugins\Login\Controller.php:395]#4 Piwik_Login_Controller->logout()#5 call_user_func_array(Array ([0] => Piwik_Login_Controller Object ([] => Login,[] => ,[] => ,[] => 0,[] => Piwik_Site Object ([] => 0)),[1] => logout), Array ()) called at [\wwwroot\piwik\core\FrontController.php:125]#6 Piwik_FrontController->dispatch() called at [\wwwroot\piwik\index.php:60]

Please feel free to advise.

Warmest regards,
Joe

thanks. fixed in trunk.