Destroyed an enemy outpost that was near one of my cities. The next turn, my closest city vanishes. I loaded an auto-save, and repeated, again my city disappeared. I reloaded again, this time I did NOT destroy the outpost, just attacked the nearby trolls, and my city disappeared again anyway.

I reloaded one more time, this time I didn't attack the trolls or the outpost, and moved away from the outpost. My city is still there several turns later.

Degugg.err file was too big for pastebin, so used dropbox:

http://dl.dropbox.com/u/9336846/debug.err

Here is the savegame from before I destroyed the enemy outpost/attacked the trolls.

http://dl.dropbox.com/u/9336846/PreviousAutoSave.EleSav