We've made some changes to the Thorim encounter in Ulduar to reduce the amount of information sent when you initially start the fight. This should reduce the amount of lag and disconnects that some players experience when starting the encounter.

If you have completed the Thorim encounter after today (10/6) and are still experiencing issues when engaging the mobs in the arena, please post in this thread.

Please keep this thread on topic, and only post if you are still experiencing disconnects during the Thorim encounter.