I thought that I setup a downloadable properly... but for some reason when (test) customer clicks "go to checkout", the Shipping Method page is displayed (along with a shipping option and price).

I have setup another downloadable test product and there everything is fine. I compared the two - both their Product Description page and Attribute Controller - they seem to be identical!

And yes, both products have those options checked:
  • Product is Virtual: No, Shipping Address Required
  • Always Free Shipping: No, Normal Shipping Rules
  • Products Quantity Box Shows: No, Do not show Quantity Box
What did I forget in setting that rogue downloadable product? Are there other mandatory parts to setting a downloadable product?

Thanks,
Daniel