There have been several reports of strange changes with creatures. I really don't know what's going on.
I've checked the data and what's on the Main Servers is the same as it's been (I didn't patch any new data by accident). The AI on the Main Servers is also the same without any of my new system patched.
The only changes are due to libraries that have been upgraded in particular, DirectX Math functions that are used in the AI. I honestly don't see how changes in those libraries could cause changes to creature behavior or speed though.
Also, in zones where players have created 'zoos' with many creatures, incoming creature position commands can pile up on the client side and cause erratic behavior as the processing queue tries to catch up.
Rather than spend more time trying to replicate these kind of issues I'm going to continue with my new AI system so that I can patch it finally to the Main Servers.
The current system on the Main Servers is convoluted and has always had many problems. I didn't program that system and I'm replacing it entirely with a much more streamlined system that should resolve all the problems we've had in the past. I'm close to wrapping it up!