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Thread Starter 
ever it seems like it, but here are a few times that it does it most.

- When I move the mouse quickly into the corners
- When I simply have to much open
- When I try to do more then 2 or 3 things at the same time i.e., open a window, then go to the dock to open an application that is already opened (so I can work in that app while the other one is launching
- and then sometimes for what appears to be no reason at all.

G4 2.66
5 GB Ram

Not up-grading this Mac, because there are some applications that haven't been up-dated, and we use them ALL the time.

I have done the Apple Utilities "Verify Disk, and Repair Disk". Is there a better option that might cure these issues?

Are the lines in my 30" Apple screen, the screen, video card or something else?

The lines are random and move with the window. If I resize the window, the lines disappear, and they aren't in every window. Mostly in PS, but are in most other app's, just not as much.