jynk on "[Plugin: Post Types Order] jquery error?"

not sure when this stopped working but i can no longer update positions. I can drag and drop OK but on trying to update i get this error -

Error: cannot call methods on sortable prior to initialization; attempted to call method 'serialize' on wordpress's wp-includes/js/jquery/jquery.js

/*! jQuery v1.8.3 jquery.com | jquery.org/license */

http://wordpress.org/extend/plugins/post-types-order/