Hi @kbatdorf
Thanks for your response!
I’ve gathered some more details:
In metaslide.image.class.php there is one function
public function get_admin_tabs()
where you can find
$url = esc_attr( get_post_meta( $slide_id, 'ml-slider_url', true ) );
$title = esc_attr( get_post_meta( $slide_id, 'ml-slider_title', true ) );
It seems that get_post_meta does not work any more for ml-slider_url and ml-slider_title (tested with 3.6.6), while it does with previous releases (in our case 3.3.x)