Since it look like a lot of people doesn't have any problem with the game, does any of you unlucky ones made any change on your computer recently? Personaly I did, my pc actually crash during the installation of the game (a flash plugin problem i think), my system was unstable during a few days after that, I've updated some windows 7 stuff, my gpu driver (who was like 2 years old) and the bios of my mb, it is stable since but can it be just a coincidence? Have you tried running some other games?
Here they talk about memory leak
http://www.reddit.com/r/DivinityOriginalSin/comments/2ej8so/performance_over_time/
