For me the shadows are not fixed. I still see the wierd shadows on trees, like constantly sparkling and moving. And performance is much worse, I am getting like 15 fps with shadows on when before i got 30 fps (which was bad too but better). is this a bug?

My system:

Windows 7 64 bit
Nvidia gtx 285 1gb ram
intel core i5 2,66 ghz
4gb DDR3 RAM