SOLVED
By any reason the CB Core plugin was not updated during the upgrade (I uninstalled CB 1.0 and then installed CB 1.1).
Looking at the CB Core php, the header was:
[code:1]
/**
* Core plugin with tab classes for: Portrait and Contact Tabs for handling the core CB tab api
* @version $Id: cb.core.php 438 2006-10-10 23:11:48Z beat $
* @package Community Builder
* @subpackage Page Title, Portrait, Contact tabs CB core plugin
* @author JoomlaJoe and Beat
* @copyright (C) JoomlaJoe and Beat,
www.joomlapolis.com and various
* @license
www.gnu.org/copyleft/gpl.html GNU/GPL
*/[/code:1]
... that has a different date from the CB 1.1 core.
Just replaced the CB Core plugin folder and now works OK.
Regards.