After have been playing for almost 40 hours, I've seen some strange crashes from these situations:

1. Walking around the river, west-northern of Cyseal, and the game crashed. It kept on crashing every time I went to the same direction, so I had to change to other direction and it turned out to be okay.

2. I casted a rain magic while in combat. When the combat ended, I saved the game and it was raining at that time. Once I loaded from that save, it hanged with blank screen no matter how many time I tried. I assume it might be the rain that caused the crash.

3. In Cyseal market, before trading, I gave Scarlet all my money to let her trade for me but when I dragged my money to her...it crashed. Maybe she didn't like my money :P