I'm not quite sure what's causing this. Does this only occur when trying to enter certain zones? Did you test any other zones to see if they work? Some zones are known to cause problems (such as my qeynos zone post which I'd eventually deleted when no one answered

; I have never once received a single answer to any of
my questions as yet, though I've done my best to help others, but I digress

), though, like Qeynos, Greater Faydark would be a bit of a problem if it's unaccessible (I haven't gone there yet in the emulator, so I can't say).
I suspect this may be a database-specific error in dealing with zone safe points. In other words, some databases don't have correctly-defined zone-in or safe points, so when you try zoning in, it causes an error & crashes. I may be wrong, but I'm quite sure Qeynos was working for me awhile back when I was using one of my older database builds ("older" as in a week ago

).
So the question is: what database files are you using?