What is the most SEO friendly shopping cart?  I have been using zen-cart for 6 years.  Seems Google doesn't like it as much as other carts.  I started a new site about 6 months ago using Magento.  When I build links to this site the terms move.  The terms are very similar.  So I would imagine the competition is the same.  I am curious if anybody has tried with different carts and found anyone to be better than the others.  Also the new site has about one tenth the amount of products but has a lot more pages indexed.