I am having similar problems like others here. Running the game in Dx10/11 mode with the intro cut scene disabled. The game freezes every few turns or so, seems to be random, forcing me to alt-tab out and shut it down.

System info:

Operating System: Win 7 Home Premium 32-bit (6.1, build 7600)
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: Intel Core2 Duo CPU E6850@3.00Ghz
Memory: 3072MB
Page File: 1378MB used, 4760MB avail
DirectX Version: DirectX 11

Display:

Nvidia GeForce 8800 GTX
Memory: 2020 MB
Display Mode: 1920 x 1080 (32 bit) (59Hz)
Monitor: HF257
DirectX Features: DirectDraw Acceleration, Direct3D, AGP Texture Acceleration Enabled
Driver version: 8.17.12.5896
DDI version: 10
Driver Model: WDDM 1.1

Sound:
Creative SB X-Fi
Driver Version: 6.00.0001.1373