The WooCommerce 2.1.9 release is now available via WordPress.org or automatic update in your administration panel. This fix release is the result of the continued effort of our contributors who provided fixes and bug reports. Thank you for helping out!
One thing we did add for the devs out there was an option in System Status > Tools for disabling shipping method/rate caching. Useful when debugging shipping.
(As always, the comments on this post are closed because this is not the right platform for support requests.)