Hi, I have recently added PS CS4. But when I open a picture or New layout. They both come up with triangle distortions of the picture and black tiangles ona new layout. You cant draw or paint over them. Can anyone help me please?

I had the same problem and here is the solution. In CS4, click on EDIT, then go all the way down to PREFRENCES, then it will open up a list on the right. Click on PERFORMANCE, Then on the bottom right uncheck the box "ENABLE OPEN GL DRAWING" and that should do it! Good luck.