dead pixels on late 2012 27-inch iMac
i've been using the default configured starry Galaxy desktop wallpaper since i bought my iMac 27-inch late 2012 and today i noticed a small light spot near one of the small stars on the left side of my screen, it is mostly noticeable standing up and looking down at it when windows are open on that side, i.e. safari, finder windows, and on lighter solid-color backgrounds. it looks like dead pixels as opposed to dirt to me, but i dunno.
iMac (27-inch, Late 2012), OS X Mountain Lion (10.8.2), 3.4GHz Quad-Core Intel Core i7