Here is a patch to fix some issues with the version of azone distributed with the server source:
http://www.rama.demon.co.uk/azone.patch
The differences against the stock code are:
Fixes a couple of instances where polys are missed out of a facelist, leaving 'holes' in the ground.
Handles the different size of the Vertex struct in V3 EQGs
Handles all the Titanium EQGs without the need for manual offset hacking
Includes geometry up to Z=3000 rather than Z=620 (Using Z=620 misses the higher parts of zones such
as Frontier Mountains and Dreadlands).
It was mentioned to me that the fear code had some issues in the EQG versions of TutorialB and Lavastorm,
so I generated some new ones with this patch applied and did some testing in those two zones and didn't
see any instances of feared mobs disappearing through walls (although my testing was limited).