The latest content patch for World of Warcraft, Patch 2.2, is live. This patch contains improvements to the chat interface, video capture for the Mac client, and Voice Chat. Please note that the Voice Chat feature will not be enabled for European realms until October 3rd. For more information about the implementation of this feature, please read this thread.
To find the full listing of bug fixes and additions in this patch, please check the patch notes.
Original post by World of Warcraft Community Site