HI there,
Looks like your version of WooCommerce uses the BlockUI library (version 2.50)
You can either try to contact WooThemes and see if there's an update for the WooCommerce or try to update the library yourself.
Here's the latest version of the BlockUI (2.64):
http://malsup.github.io/jquery.blockUI.js
Github: https://github.com/malsup/blockui/
In one of my sites I've fixed the warning by just upgrading to the last BlockUI version.
Cheers.