As of the previous release, Drupal Commerce depends on Drupal >= 7.15.
Drupal Commerce 1.5 is a maintenance release incorporating 42 patches from 21 contributors around the world. This includes 14 new contributors to the project, some of whom scored their first commits as Drupal contributors. : )
These patches fixed a variety of bugs, improved performance, and added new features to the core of Drupal Commerce, including:
Improved Rules integration! We fixed a longstanding issue where conditions on pricing rules that loaded orders caused recursion in the calculation process. We also added a condition to compare against the quantity of products of a particular product type on an order.
Product revisions are now integrated with Views, including a tab on product admin URLs to view the revision history and a relationship to include revision information in product Views.
Customer order view pages now have local action links for administrators to quickly jump to the order edit form for the order.
Improved entity access control, including the resolution of a longstanding issues pertaining to line item access.