Hooked up via HDMI to a Dell U2410 Monitor, stock Mini. Every now and then regardless if I'm in OSX or Win 7 via bootcamp the display throws a blurry line through the screen. The line goes across the whole screen and is maybe a couple inches thick. It happens maybe a couple times a night and it's not a load based issue as it does it just sitting at the desktop in the OS. Anyone else experience this?