Blizzard has recently implemented a couple of fixes to World of Warcraft: Cataclysm. These “hotfixes” are directly related to guild achievements, flasks, and cauldrons. The fixes will correct some consequences that were not intially intended in the game and many will be unlocking achievements at the levels that were intended in the guild progression system originally.
Mix Master will now require your guild to craft 1,000 Cataclysm flasks which was originally 10,000. And the Better Leveling Through Chemistry will now require 3,000 flasks down from the lofty 25,000. If your guild has been trying to earn these achievements and is already above the new threshold level you will automatically recieve these achievements when the hotfixes are put into place.
For the Full Breakdown on the Fixes visit:
Source: World of Warcraft