I have been playing the game since beta, and last night may have been my worst Perfect World Gold experince. A group of us who play together regularly were trying to complete volume 1 book 9, which takes you into anuminas. As we were finding the people we needed to talk to for the early chapters of the quest and completed some of the side quest, we were noting that the mobs were acting strangely. They seemed to be going into anti-exploit mode very easily or pathing strangely. For instance, when trying to save the prisioners out at the docks, the non-ranged mobs would in the water and try to get us by swimming to the stair out of the water and then running back up the dock to us, rather than taking the two steps towards us, though they would generally go into anti-exploit before making the trip. But, though annoying, it was mostly manageable.

However, when we tried to complete the book 9 chapters, we got to Perfect World Silver where we had to find order off angmarim in three different locations. We went to one of the locations and tried to engage the mobs. We ended up quiting in frustration. Every time we tried to fight the mobs, they would either run off some strange direction and get themselves caught in some further away from them, and if we did not get them out soon enough, they would reset to full health.