Received my Christmas present a new(refurb) iMac 24", today. Love it! However during the course of playing with all the features, popped in a DVD and noticed these images in the corner of my screen when the screen went to black. I've increased the exposure ever so slightly in order to highlight the areas. The lower right hand corner of the screen seems to appear the 'brightest'. If I am just being over zealous in my scrutiny of a new item, please let me know, otherwise I would appreciate any advice or insight into this teeny tiny nit I've discovered.