I had saved this fortress, and went to load it up, and now it is consistently crashing a short amount of time after loading. The timing of the crash is not entirely consistent, sometimes it takes only a few seconds, sometimes a few minutes. Different messages appear in the intermediate period each time (once a fey mood even began, though he didn't manage to claim the workshop before it crashed--the crash itself doesn't seem to be mood-related, since only once did a mood occur before the crash).
My original suspicion was that it might be because my Duchess is meeting with the Elf Diplomat, and the King wants to arrive because all the requirements are met--which causes some sort of crash because normally, the King would meet with the Elf Diplomat if he is present rather than the Duchess. Therefore, I tried deconstructing a road in order to make my fortress unsuitable for the King's arrival, but even when it lasted long enough for me to get the road removed, it still crashed, so that may not be the problem (or the King may simply already be on his way and there's no way to stop him). Again, that's just a random theory I had and may not be related to the problem at all.
I even tried a "final solution" type scenario: I canceled every job in every workshop, cleared the manager orders, undid every designation on every z-level, locked the countess in with the diplomat, and canceled all pending hauling to the trade depot. No dice, it still crashed shortly afterward.
At any rate, I originally made this fortress under the following conditions:
Init: Economy turned off, zero rent on.
OS: Windows XP
System: AMD Athlon 64 bit processor, 986 MHz, 1gb of RAM
Originally, I used the May Green/Mike Mayday tileset v13, though I can reproduce the exact crash on a game with no tileset installed (game loads normally, fortress runs for a brief amount of time, then crashes, no errorlog.txt appears). No other mods have been used at all.
I can also reproduce this even after transferring the fortress to my laptop and running it on a clean DF copy, the laptop has Windows Vista and a much better processor.
So summary: the save consistently crashes under different OS's, no mods, and with/without a tileset, though it loads correctly under all those conditions. The exact cause of crash is unknown.
Here's the save:
http://www.mediafire.com/?njmvhii2mz0I also uploaded the error report Windows gives, though I'm unsure as to how much help that is:
http://www.mediafire.com/?nmczmnmu1mz