I just bought my first mac on Thursday from a friend and am having some display issues. (the mini was brand new, sealed, never opened) I also bought a new Dell 17" widescreen lcd monitor. (model #SE178WFP) Here's the problem... Anytime I open a window of some sort, whether it be Finder or Safari or any other app, I get these faint vertical lines that run up and down the screen in the background. Sometimes when I move the mouse around, there's a vertical line from top to bottom that follows the cursor. I have the Resolution set to 1440 X 900 which the monitor can handle. Has anyone experienced this issue? Even when there are no windows open, you can still see the lines & shadow...kinda like burn in. Could this be a bad monitor or the mini itself or something to do with the refresh rate? I haven't installed the cd that came with the monitor yet. Anyone have any ideas to what it might be? If it is the Mini, will it be covered by Apple? Any tips or info will be much appreciated. Thanks Please click on the picture to open in full screen and look at the top near the address bar to see what I'm talking about.