...
Previously, order total discounts caused order failures when applied to an order with tax. This issue has been resolved We resolved this issue, and order total discounts will be applied to taxed products as expected. Please note that this does not yet apply for stores with inclusive tax.
...
Previously, customers with $0 orders were unable to checkout because there was could not check out because no zip code was on file. This requirement has been removed for $0 orders, and customer checkout now proceeds as expected.
...