Hi Everyone. This may be a known problem but I just don't know what to search for it as... I have "box" lines appearing around my Hard Drive icon, on the desktop - they appear as a single line box inside a double line box. When I launch Safari (or other applications) the double line box disappears from the icon but becomes a single line box around things like search boxes when I select them on the Safari page (and is around this text box as I'm typing). If I then scroll up and down the page the "box" remains stationary whilst the the text on the page moves past it. Have tried rebooting but the problem remains. Don't know if it's affecting my Mac (MacPro 2.8ghz quad core, 2gb RAM) but it's just irritating to see. Has anyone encountered this before? Any advice will be appreciated.