Got to the middle of the game when the game crashed and about ten windows popped up with "out of memory" boxes. I had six cities with 3 at level 5 and about fifty units or so. I was on an escort quest when the game crashed.
Smaller bugs:
Sometimes when fading in and out from the cloth map the interior of the city will be empty or part of the exterior border will disappear.
While travelling via the cloth map I ran into a caravan and the book found was deposited on the adventurer in my capital city rather than in my sovereign who found the book.
In a separate post mentioned problem with travelling on the cloth map and not triggering quests at inns.
Didn't find a debug.err file. Running win7 pro. Found the dump but I'm leery of installing unknown software in order to use dropbox. My apologies. My diagnosis is linked above and I didn't see any problems. If there is a different option to upload that doesn't require installation I have no problem with doing so.