Hi - I have Prestashop 1.6 running several multistores, each with a custom theme. For some reason last week the shopping cart block disappeared from all of the stores, and the layout on the homepage changed (text no longer centered, etc.). Instead of the cart and login links, the products all have an Add To Cart button. Customers can use "Add to cart" to process a new order but existing customers have nowhere to login to their account. I'm baffled - I've tried resetting the cart block module. Can anyone help?