[Plugin: Video Thumbnails] Scan Past Posts?

Do you know which version of PHP you’re using? Can you give any more details?

I think I have a temporary fix for you. I believe the same bug that causes the page not to load when there isn’t a slash is causing the plugin not to insert the appropriate JS on the admin page. Find this block of code in the plugin:

// AJAX for Past Posts

if ( isset ( $_GET['page'] ) && ( $_GET['page'] == 'video-thumbnail-options' ) ) {
	add_action( 'admin_head', 'video_thumbnails_past_ajax' );
}

and replace it with this:

// AJAX for Past Posts

add_action( 'admin_head', 'video_thumbnails_past_ajax' );