I have recently upgraded from CS5 to CS6 as part of an overall computer upgrade. Unlike CS5, I am finding that some of the major tools in PS CS6 suffer a lag in that there is a delay between the mouse input and the required effect taking place. The brush tool, clone tool and burn and dodge tools are particularly affected but there are others. This seems to be a recognised problem on one or two forums. Has anybody suffered the same problem and found the cause/solution. My system is useable but it's a pain. I thought it worth asking.