First of all, AWESOME plugin. Will definitely pitch a few dollars your way soon on your website.
Anyway, enabling the plugin causes this error to appear at the bottom of product pages (where up-sells would usually appear).
Fatal error: Call to a member function get_upsells() on a non-object in /plugins/woocommerce/templates/single-product/up-sells.php on line 14
Disabling the plugin fixes the issue.
Any advice on what to do?