We ran a 10 man Karazhan tonight and found the following:
Trash: A lot of the trash did not move properly but from what the group was saying this was also pretty buggy in retail.
Attument the Huntsman & Midnight: Worked Perfectly
Moroes: Worked Perfectly
Maiden of Virtue: Worked Perfectly
Opera Event (Wizard of Oz): Worked Perfectly
The Curator: Worked Perfectly
Terestian Illhoof: Spawned a duplicate of the Main imp to begin with but rest was fine
Shade of Aran: His minor spells worked correctly but Blizzard and Arcane explosion did not
Netherspite: Unable to test as the door closes so you cant enter and he run out of the room.
Chess Event: Unable to test as the pieces don't interact correctly and the opposition pieces don't move.
Prince Malchezaar: for the better half works ok but the infernals do not spawn correctly
Nightbane: Unable to spawn.
Please let me know if you need more info on any of this and happy to provide.