javascript error for me on 3.8

Same for me.

This is unfortunate; I love this plugin. Hope it gets fixed soon. Anyone find a solution/workaround?

I was able to fix this error on my site by making the following change at line 181 of ajax-thumbnail-rebuild.php

Replace this code

$attachments =& get_children( array(
				'post_type' => 'attachment',
				'post_mime_type' => 'image',
				'numberposts' => -1,
				'post_status' => null,
				'post_parent' => null, // any parent
				'output' => 'object',
			) );

with this

$args = array( 'post_type' => 'attachment', 'posts_per_page' => -1, 'post_status' =>'any', 'post_parent' => null );
$attachments = get_posts($args);

Edit: fix might be even simpler : https://github.com/breiti/ajax-thumbnail-rebuild/issues/5