Hi, after installing Catalyst 12.3 on Ubuntu 12.04, the driver works ok, but all transparency effects from windows or uniy are really slow, ie:

Open, close unity dashboard
Minimize, Maximize any window

I think that every compiz effect is slow.

Is there any way to optimize video to have a usable Unity with my video Driver? I have a Radeon HD4890 1gb!

Thanks a lot!