Hello. I am experiencing a very odd problem. Starting two days ago, after about 20 minutes of use on my mac, some of the icons on my desktop will suddenly have distorted pixels, as well as all of the open windows will have a black box surrounding it. I am almost positive that this has nothing to do with my video hardware going bad, rather something corrupted in the operating system. This has happened sometime after I had installed the Adobe CS5 photoshop trial. I have recently uninstalled it, but this problem still persists. As soon as I log out, or restart the computer, everything is back to normal. When the 15-20 minute mark comes, all of a sudden everything starts getting distorted. I am also running Mac OS X 10.6.3 currently. Here is a screencap of what is happening: http://img708.imageshack.us/img708/637/distoredpixels.png In the image you can see that the bottom dock is corrupted looking as well but the icons stay in tact. This is very odd. Any help or suggestions on fixing this problem will be greatly appreciated.