Same problem here - just had it happen three times in a row - first time I was joining allies to beat a large group and barely managed to win. Crashed after looting. Then I reloaded, lost the battle, went to town, recruited more men, tracked down the large party and beat them again and crashed after loading screen. Third time it was saved after the lost battle, so I went to town again and tried again with more men and won - but crashed after looting.
These crashes give no error - just quits out to the desktop. Very frustrating - I hope someone is looking into this, this is a great game otherwise!
-Jason