I jsut want to share my experience about an early version of V 4.0.6.
I've made the upgrade from 3.6 in a test site, and after the live site is updated I've noticed that if a user selects a quantity for products to add it does not matter, the system adds only one product to the cart.
The reason:
I've used a very early version of 4.0.6. that had this bug...
The solution:
Get the newest archive, and find the block_product_details.php (54 135 Bytes) and replace the old one (54 105 Bytes).
