A number of issues were hotfixed according to to Ommra on the EU forums.

05/25:
* A hotfix has been deployed that prevents Linking a Poison Recipe or Hunter Pet Ability in a chat message from causing a disconnect
* A Hotfix was deployed that prevents Seer Olum from despawning too quickly after being rescued from the serpent shrine.
* A Hotfix has been applied that prevents Coilfang Ambushers from being charmed.
* A Hotfix has been applied that keeps the lurker in the water until all of the adds are dead.
* A Hotfix has been applied that changes Gruul's hateful strike target to the 2nd highest on the threat list instead of the 3rd highest.
* A Hotfix has been applied that respawns the gem vendors in Thrallmar and Honor hold.
05/23:
* Al'ar's Meteor ability will now do less damage and its damage will no longer be divided between multiple targets.
* We're working on a hotfix for the problem where Krosh Firehand's Spell Shield is not cast immediately upon entering combat for a Mage to Spell Steal. This was not an intended change and we hope to have it fixed soon.
* The hotfix for the Spell Shield has been deployed. The Spell Shield should be cast in a much more timely manner now.

The hotfix post can be found here.