Two part question. Suddenly I'm getting a glitch visible on photos. There's a greenish outline to images. Ive seen this before when my monitor started going bad. My fault, I'm sure. I never turn it off, but a always use a screen saver. Do what is the cause of what I'm seeing? Am I right? Monitor going bad? If so, what are some good but inexpensive alternatives to Apple displays? I'm using a Samsung presently. I'm on an upgraded MacPro 2009 3.46 Ghz.