Problems with the cart class

[eluser]Brayan[/eluser]
I have 2 problems:

1 . I can’t add products that names have slashes to the cart.. they are not added
other products that dont have slashes are usually added


2. On the cart->update(), I want to update the price of the product too, but it doesn't work
I only can update the quantity ? on the user guide its just quantity that they show on example :-(


There is a way to solve this problems ?

thank's a lot and sorry for the bad english =\