Product Attributes Problem In Preview Release 2.1 Fixed!
Inniyah has contributed a patch to fix the problem of not being able to add multiple products with different attributes into the basket.
11th April 2001 by Harald Ponce de Leon
A detailed upgrade instruction from Preview Release 2.1 is available on his website at: http://ns.mediasur.com/code/Exchange.html.
Inniyah, muchos gracias! :)