WP3.5 MS MU Central Taxonomies = not work?

i hardcoded the table prefix and it worked I dont know why.
how ever auther should notice

$wpdb->terms = "wp_terms";
$wpdb->term_taxonomy = "wp_term_taxonomy";

Please update the plugin, it’s nice to have and keeps your rating good ??

This worked for my clean WordPress 3.5.1 install:

add_action('init', 'central_taxonomies');
add_action('switch_blog', 'central_taxonomies');

function central_taxonomies () {
	global $wpdb;
	$wpdb->terms = $wpdb->base_prefix."terms";
	$wpdb->term_taxonomy = $wpdb->base_prefix."term_taxonomy";
}

hi i tryed everything it is not working at all, need HELP

okay i got it partly working i also can pull all posts with

$wpdb->posts = $wpdb->base_prefix.”posts”;

however this also pulls all pages etc. I only need to pull the post_type “coupon” how do i accomplish that???