Catalyst 7.12 not good for Blender?

I have installed Catalyst 7.12 today and I’m experiencing serious problems with Blender (2.45 SSE2). When I select any object Blender freezes for a while (about 10 seconds) making any work impossible. I have tried to reinstall the drivers but it didn’t help, so I’m back to 7.10 now. My graphic card is X1950GT AGP.
Anyone else noticed that?

Edit: I found out that the 7.11 OGL driver works fine, so I copied it into the 7.12 installation.