Today Blizzard launched another patch to the game, this time patch 3.1.3. Most of the patch is minor class changes like those outlined below, as well as an Ulduar fight change and a few other changes.

Death Knights
- Frost Presence: Armor bonus is now 60% down from 80%.

Warriors
- Blood Frenzy: This talent now provides 5/10% haste instead of 3/6%.
- Bloodthirst: Cooldown reduced from 5 seconds to 4 seconds, and rage cost reduced from 30 rage to 20 rage.
- Juggernaut: This talent now also increases the cooldown on Charge by 5 seconds.

You can find a complete listing of changes here.