I just updated DNN from 5.6.3 to 6.0 and updated the Smith Cart from 4.43 to 4.48.

I have two variants on a product, when I select a variant using IE 8, the Ajax swirl just spins.

In Chrome and Firefox the page refreshes, removing the product and variant from the page. The only thing that's remaining are the product description, Continue Shopping button and View Cart button.

I reverted back to DNN 563 and updated the cart to 4.48. This issue is not a problem in DNN 563, only in 6.0