I was sitting here a few weeks back, chilling, surfing on the web, when I noticed a period on the Google search page began moving around. WHAT??! I screamed in my mind, so I leaned in closer for an inspection. Sure enough it was some sort of tiny bug crawling around INSIDE the display of my 20" white iMac. So I had 2 options:
1) Smack the screen really hard, killing it and possibly damage my screen
or
2) Put my display to sleep and pray that it crawled back out
Sure enough option 2 worked, thank god, because a little dead bug in my display would surely drive me crazy. Perhaps the Apple displays aren't sealed good enough? Or maybe this is a flaw with flat panels, as a web search yielded many cases similar to mine.