Fix for 9576.. have a look on it later

functions.php

	// Generate logged in/logged out status
	if ($user->data['user_id'] != ANONYMOUS)
	{
		$logout_redirect = false;
		if ($user->page['page_name'] == 'viewtopic.php' || $user->page['page_name'] == 'viewforum.php')
		{
			$logout_redirect = true;
		}
		$u_login_logout = append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=logout' . ($logout_redirect) ? '&redirect=' . urlencode($phpbb_root_path . $user->page['page']) : '', true, $user->session_id);
		$l_login_logout = sprintf($user->lang['LOGOUT_USER'], $user->data['username']);
	}