I've had a refurbished iMac for about a year now its a G5 2.1GHz and 1.5 GB of Ram but just recently it seems like my screen will get blurry when im moving around its will appear blurry at time then return to normal while im moving the mouse it shows up most of the time when im on the internet but it also does it in all the program I was just wanting to see if anyone else has had this problem or may know how to fix it.