I saw on many private servers (saw it even on Nostalrius), that mobs can teleport up and down vertically while moving, or something similar is that while falling, they are teleporting downwards bit by bit, instead of linear falling. Is it a general private server/emulator issue, or something specific?
Mobs really have no reason to fall and you won't experience that on Kronos. If you jump off a cliff while a mob has aggro on you, he will find a 'safe' way towards you, or if that's not possible he will evade and reset. No falling.
As for simple movement issues, there were only two I remember from the previous Kronos. The first was that sometimes a mob would get stuck while chasing you, especially when chasing around small terrain objects that blocked its path. When that happened, the mob began to calculate his path so furiously that your whole screen froze for ~20+ seconds, while the world continued on its own. And, depending on your surroundings, sometimes you found yourself dead after such freeze. The issue didn't even occur often and the last time I experienced it happenning was during early levels in Barrens. What I'm trying to say is, that it got fixed really quickly.
The second one was, that mobs were affraid of following you on some (rope) bridges. They acted as if the bridge wasn't there, as if you were standing on thin air, and therefore they just waited until you came back, or they evaded. If you need an example of where that would be a problem, think about Thousand needles, fighting those tauren that live up on those pillars. Some of those tauren even patrolled the bridges, because that's what they should be doing and you could see that it was causing them major problems. Those are the only mobs I've seen on Kronos that were "walking incorrectly".
But, as with most things on Kronos, this has also
been.