See it here:
http://www.blacklibrary.com/Downloads/Product/PDF/Warhammer-40k/7th-faq/Farsight_Enclaves_v1.1_May14.pdf Remember, you're looking for the magenta color for the most recent change.
This errata sums up everything that is wrong with
GW these days. They released an errata for a special piece of terrain used in ONE scenario located in a Tau codex supplement. With all the other issues out there, this is the area they are concentrating on? Going through sideline codexes and changing scenario bits for ONE specific scenario? One that can ONLY really be played by a Farsight Enclave and Daemons player? Why?
In an edition where
GW is harping on the narrative and telling the players to basically establish the rules of play before they play the game, why would you release an errata for a special piece of terrain that could just very easily be decided by the players before the game? It smacks of total hypocrisy that you would all but demand players make up the rules and forge the narrative, then take a portion of that narrative away from the players by errata of a special piece of terrain.
Obviously, this scenario must be
very popular at the
GW HQ, and they must play it every day in order for them to have to release this critical errata for it so they could
forge the narrative harder.