Upgrading from 1.3 to 1.4.3, the site does not see the product categories related to (by the admin and all ok!)

[stefano.ambrosini]

In Frontoffice you see all the categories and the latest articles posted on the site are displayed
http://www.hobbydicarta.it/prestashop/

If I click on any category (eg http://www.hobbydicarta.it/prestashop/category.php?id_category=24)
the system returns the number of articles in that category but does not show them to me.

In the back office rather see everything correctly.

The theme is based prestashop installed.

What to do? With Infinite