Far earlier than any of us had expected, Daelo has announced
that the normal modes of Professor Putricide, Blood-Queen Lana'thel, Sindragosa, and the Lich King will no longer have limited attempts. The heroic modes of these encounters will still have limited attempts, however. To quote:
After each region's maintenance this week, raids will no longer lose attempts on wipes in Normal mode for Professor Putricide, Blood-Queen Lana'thel, Sindragosa, and the Lich King. There will still be limited attempts in Heroic mode.
We will continue to monitor developments in Icecrown Citadel in the future, especially since the Heroic difficulty has been unlocked by a significant number of raids.
A very interesting development, and I'm curious why they decided to lift the attempts system from normal modes entirely. Is it due to a relatively low number of guilds actually killing these bosses right now, or is there some other reason?