According to WoW Insider , Patch 2.1.3 is out on the live realms today. It is a pretty small patch.. Here are the details:
World of Warcraft Client Patch 2.1.3
Read in-game mail will now be kept for thirty days instead of three.
The Warlock spell Incinerate has had the performance of its graphical spell effect improved.
The newest patch is out and it fixes our Hunter misdirect! Yay!!!…
Full Patch notes follow. (Thanks Blizzplanet for the info)
On the WoW Fourms here by Tigole, he states:
After a lot of thought and deliberation, we’ve decided to remove the attunement requirements to enter Serpentshrine Cavern and Tempest Keep: The Eye. While many of our attunements in the Burning Crusade have been good progression checks, a few of the attunements have turned out to cause [...]