I have been having this issue since around rev 330 or so. Please see this thread for the full writeup and what I have done to track it down to bots:
http://www.eqemulator.net/forums/showthread.php?t=27523
At first zones were crashing when a PC died and bots died. Also even when bots werent enabled. I changed up my make files a bit and now it only happens when I have bots enabled and a bot dies.