I've experienced something similar at the western gate, the one leading to the undead parts. The strange thing is that the first time, I passed through there it was fine (I was coming from the west into Cyseal, but when I headed back, I got a "win32 exception error" (and I'm running Win7 64-bit, not 32 bit). Then every time after that it crashed when I tried to go that way after passing a certain point.
I gave up and deleted that saved game, thinking it was corrupt, but when the game crashed after trying to load another saved game, I gave up and uninstalled the game, then reinstalled it. I do not know if that will help fix it. If it doesn't, then the beta will essentially be unplayable for me, as there's nothing left to do.
