Permafrost
 

Mobs at the king camp fall through the floor and run through the walls. I'm not very familiar with the zone but it seemed like mobs where falling through the floor when traveling from the bottom to the top using the ramp. Also, they would completely skip our group and travel through the wall behind us. Mage pets do the exact same thing. It caused many trains. Our group was camped just inside the iron gates to the right.

Was trying to break the King room camp earlier this week and noticed a lot of the same. There's one Elite that spawns on the ramp that appears to be in plain view but can't be pulled with spells (you get a message about not being able to see your target, even if you're above him on the Z-axis) and had to pull with a pet and spamming the "back off" button. Also experienced the same issue above when trying to pull a goblin standing on one of the icebergs that jut up sharply near the entrance of the king room. Gobbo disappeared, then about 60 seconds later, appeared running back into the room through the gate with about 20+ mobs in tow.

Unless you run TO the king spawns and take pathing out of the equation, this area is EXTREMELY dangerous due to pathing bugs.

Can confirm problems with both pathing and being able to "see" mobs for pulling in the king room on green as well (I see this is in the Velious part of the bug forums).