Unable to save differnt shipping address

Very weird…

I installed a fresh version of the latest CSCart, along with the sample data. When I register an account using a shipping address that is different than the billing address, the shipping address is not saved as it was entered. Instead the shipping address matches the billing, as though the “Use my billing address” box was checked. But the “Use my billing address” box isn’t even shown.

I am using the basic template with absolutely no modifications. I haven’t even changed any of the settings. When I look at the CSCart demo store, the “Use my billing address” box shows. Why doesn’t it show on my site?

I am using the most up-to-date version of CS Cart.

Anyone seen this before?