Got this after I returned from PayPal back to the site after re-amping
Warning: array_keys() expects parameter 1 to be array, null given in uc_attribute_order_product_alter() (line 474 of /srv/www/freetalklive-capistrano/releases/20130524045052/prep.freetalklive.com/sites/all/modules/ubercart/uc_attribute/uc_attribute.module).
Warning: array_shift() expects parameter 1 to be array, null given in uc_attribute_order_product_alter() (line 474 of /srv/www/freetalklive-capistrano/releases/20130524045052/prep.freetalklive.com/sites/all/modules/ubercart/uc_attribute/uc_attribute.module).
Not sure why my sub was cancelled by PayPal, all my payment data is up to date, but it wouldn't let me manage the subscription so I created a new one and that's when I got this error.