In October 2011, Magento ecommerce released version 1.6.1 which adds some new features to Magento ecommerce including a two-step password reset flow and a Webservices API update.
Finally Magento ecommerce 1.6.1 allows you to add configurable products to your wishlist with options defined – making it much more easier to save products you want to buy later.
Before 1.6.1 when you wanted to buy a T-shirt that was on your wishlist you would get redirected back to product page to chose size. That made your way from wishlist to a cart a multiple clicks journey. Now its as simple as clicking add to cart directly on your wishlist.
Check out www.magentocommerce.com for more info on Magento ecommerce 1.6.1 release.
Dont forget: backup all your files and data base before upgrade to new Magento ecommerce version!