Thanks Nicolas, but the behavior is a little different:
1) I create a "Cart" menu item and leave empty the "redirect when cart empty" parameter in HikaShop.
2) In the front-end, clicking on that menu item will redirect to the shop => some SEO tools notice a 301 redirect problem since the menu link does not point directly to the destination page (that's one problem).
3) I add a product to my cart, then the "Cart" menu item will not redirect and I can see my cart.
4) Now I remove the product from the cart, the cart is empty => the "Cart" menu item is still usable, it will not redirect to the shop even if the cart is empty, most probably since a cart was created althought without any product.
I think this is not very consistent and why not leaving the administrator the option of not redirecting the cart even if empty? Since there is an option, when the option value is empty the redirect should be disabled in my opinion.
Cheers and thanks
Giuse