When  clicking the add to cart button on the product details page it just shows a spinning / animated gif.  It just spins away and never completes.  If I go to another page and back to the cart it shows that it did add the item to the cart.

Smith Cart 4.48 and DNN 6.0

I'm using IE 8.0 and am not using compatability view.   It still shows the mask on checkout step 2 when clicking on the CCV cod or whats this link.

When turning on compatability view it shows the mask but most people won't see the box and won't click on it essentially locking them on step 2.

This is using DNN 6.0 and Smith Cart 4.49 same problems still exist for IE 8