Query custom type posts by array of IDs

Question

I can't seem to get post__in to work with custom post types. Is this true? What's the alternative?

$args = array('post_type' => array( 'post', 'page', 'tf_events', 'duka' ), 
   'orderby' => 'menu_order', 'showposts' => -1, 
   'post__in' => explode(',',$mtheme_featured) );
query_posts($args);

$mtheme_featured has two ids separated by commas, one post and one tf_event; only the post is shown.

Answer 1

You said the post type is called 'tf_event', but in the 'post_type' array it's 'tf_events'.