Read patch notes for the PTR patch (4.0.6).
http://us.battle.net/wow/en/blog/2011384 It's also on the front page.
Professions
•Archaeology
•Archaeology fragments now have a hard cap of 200 per race. Players will not be able to collect additional fragments until they complete artifacts to take them down below 200 fragments. Players with more than 200 fragments will not lose additional fragments in 4.0.6, but in a future patch we may remove any fragments above 200.
•Cooking
•Multiple spawn locations now exist for the Confectioner's Sugar (daily quest item) in Stormwind.
•Jewelcrafting
•Meta gems with the Chaotic and Relentless prefixes now have a requirement of 3 red gems.
•New meta gems have been added: Agile Shadowspirit Diamond (Agility/3% critical damage), Reverberating Shadowspirit Diamond (Strength/3% critical damage), and Burning Shadowspirit Diamond (Intellect/3% critical damage). These new recipes are unbound and can drop from any Cataclysm creature. The new meta gems have a requirement of 3 red gems equipped.