Here come some Wrath Classic improvements, with a couple of class changes and a Yogg-Saron fix!
June 20 (Source)
Wrath of the Lich King Classic
Classes
Mage
Ice Armor should no longer fall off when players have either rank 1 or rank 2 of Frost Warding.
Warrior
Blood Frenzy should now fall off when Deep Wounds falls off the target.
Dungeons and Raids
Ulduar
Yogg-Saron
Guardians of Yogg-Saron will once again spawn normally during Phase 1.