I?′ve been experimenting, but I don?′t know PhP so:
I?′ve hacked template-functions-post.php, and I?′ve replaced <a id="more-'.$id.'"></a>'.$content[1];
by <a href="'. get_permalink() . "#more-$id\">$more_link_text</a>";
and now woks, but the entry extended display more_link_text ??
I don?′t know why happens this, because on the other wp installation I?′ve <a id="more-'.$id.'"></a>'.$content[1];
and works ??