I have the same problem as stated by previous posters.
When starting a battle it runs without any performance problems. Then after a random time the game freezes and I have to kill the application. Most of the times (maybe always) the freeze happened when giving some command with the mouse. So far I was never able to finish a battle during my 10 attempts.
AMD 64 x2 3800
2 gig ram
GeForce 7800 GT
XP SP 2