Blizzard just updated patch 4.2
with some hotfixes for July 12. Most notably, the Ragnaros encounter at the end of the Firelands raid went through many changes due to the high-end guilds' finally making it to his chamber. Ragnaros' enrage timer was increased, portions of his platform that were being used to dodge mechanics were changed, and the extra phase on heroic difficulty was, hopefully, fixed. The Molten Front and the Regrowth daily questing areas were also hotfixed, with wounded Hyjal defenders now appearing wounded and those pesky Windcallers now appearing a bit more quickly (if you chose the Druids of the Talons).
Hit the jump for the full notes.