Latest WP, latest WooCommerce, checkout errors

Hi – After updating to WP 3.8.1 and WooCommerce 2.1.6, my checkout is showing an error:
Warning: array_intersect() [function.array-intersect]: Argument #1 is not an array in /home/content/33/11183433/html/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-shipping-method.php on line 180
Warning: in_array() expects parameter 2 to be array, null given in /home/content/33/11183433/html/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-shipping-method.php on line 190

Do I need to remove/change some code?
My site is icepondpress.com