Just as the subject says. Products can be added to the cart, the cart widget and view cart options work just fine. Paypal information is set up 100% correctly, as it all other settings (as far as I can tell anyway).
The problem is that, simple put, the "Checkout" buttons both in the widget and on the View Cart page do absolutely nothing. They just link directly back to the page they are on, no matter what page they are on. If they're on store/products, it links back to store/products. If it's on store/cart, it links back to store/cart. It's the oddest thing.