Quoted from: Zarhym (Source)

Icecrown Citadel

• Blood-Queen Lana’thel: Pact of the Darkfallen now applies damage twice as often, but for half the damage. This change will make the removal of the spell a bit more responsive.
• Hellscream’s Warsong and Strength of Wrynn now provide their bonuses to player pet health and damage, as well as the absorption amounts of Power Word: Shield and Sacred Shield.

Death Knight
Glyphs

• Glyph of Icebound Fortitude: Now always grants at least 40% damage reduction.

Priest
Tier 10

• Priest Tier-10 4-Piece Healing Set Bonus: Redesigned. This bonus now increases the effectiveness of the caster’s Power Word: Shield by 5% and Circle of Healing by 10%.

Glyphs

• Glyph of Scourge Imprisonment: Now reduces the cast time of Shackle Undead by 1 second, up from 0.5 seconds.

Rogue
Glyphs

• Glyph of Deadly Throw: Now increases the slowing effect on Deadly Throw by 20%, up from 10%.
• Glyph of Expose Armor: Now increases the duration of Expose Armor by 12 seconds, up from 10 seconds.
• Glyph of Feint: Now reduces the energy cost of Feint by 20, up from 10.