Late 2013 iMac and image retention issues
I just purchased a certified refurb Sept 2013 iMac 27" 3.5GHz i7 3tb. I've already read the image retention advice on the Apple website (http://support.apple.com/kb/HT5455) and the problem keeps showing up. Additionally, I don't feel that I should have to keep such a close eye on my screen on such a new machine. I'm running a screen saver when I'm not on the computer, and I shut the display down if I'm leaving the computer for the day. I can't even have a desktop picture without seeing a burnt in image of the picture on my screen. Any help would be appreciated.
iMac (27-inch, Late 2013), OS X Mavericks (10.9.4)