From Diablo Wiki
Patch v1.06 was published November 27, 2012. It contained just a couple of minor bug fixes, and no major game changes.
We will soon begin limited testing on minor updates to Battle.net’s communication and login functionality. Patch 1.0.6 includes some of the data for this testing, but please note that the changes will not be visible to players or impact your play experience in any way. For more information, please see this blog post.
- Fixed an issue that allowed players to bypass the one-second trade timer when exchanging items via the Trade window.
- Fixed an issue that caused the same item to occasionally drop for players using Threatening Shout with the Grim Harvest rune