post indexer + domain mapping when changing domain + global site tags

Hiya !

something strage happenning, i suppose it is post indexer when using globals site tags :

Context :

I change my mapped domain fews days ago on one of my subsite (wordpress-blogs => wpmu-blogs

BUT

All post written BEFORE the domain change are still pointing on the old domain so WP redirect me on the site creation form !

Look : http://mgr-artagency.com/tags/wpmu/

How can I update those links ?