Since upgrading to Store v2 we have started to notice 'empty' order confirmation emails coming through. There are no products listed and the value of the order is £0.
Checking the admin these orders are being marked as paid, but the customer and order details are blank. I'm not sure if this is a result of the upgrade, or if some naughty external script has just found the site and knows what php scripts to call to trigger the emails.
Grabs of the empty orders in the admin follow:
Order list - notice the green 'yes' paid marker.
Order detail page