Hello,
I've found this bug..not sure exactly where the problem is but in the checkout settings you check this:
Use collapsing checkout panes with next buttons during checkout.
and check this:Hide shipping information when possible for carts with no shippable items.
And you purchase a product with no shipping information (like a file product), then when you click on the next button after the customer information (email), nothing happens. The Billing information should open, but I suspect the next button sent a request to open the shipping information.
Not a very big bug, but still..


