woothemes/woocommerce — pull request #1802 by coenjacobs (2012-11-22 13:33:34+00:00)
Title: IMPORTANT MERGE: Product classes (read notes!)

This change will break any plugin directly calling the WC_Product class:
* This got changed into an abstract and should always be called through the Product Factory or get_product() function introduced by this merge.
* We will create documentation for this when this version comes closer to release.

In other words: If you use this development version on a live site, there is a chance things will break. ;)