Trackbacks and pingbacks in recent comments

Hi,

I’m using the recent comments widget on my site and I have some code for getting rid of trackbacks and pingbacks from it. Until recently this has worked fine.

This is the code I use:

//remove pingbacks and trackbacks from recent comments
if ( !$comments = wp_cache_get( 'recent_comments', 'widget' ) ) {
	$comments = $wpdb->get_results("SELECT $wpdb->comments.* FROM $wpdb->comments JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID WHERE comment_approved = '1' AND post_status = 'publish' AND comment_type IN ('comment', '') ORDER BY comment_date_gmt DESC LIMIT 15");
	wp_cache_add( 'recent_comments', $comments, 'widget' );
}

Any ideas why it isn’t working any more?

/Calle