There are some very misleading YouTube Videos out there about Doubled Die DDR/DDO .. they show a normal cent when they state it's a DDR. Essentially they conclude that since it is a certain year and mint mark that it *must* be DDR, when in fact they are incorrect.
What? "Misaligned Die Strike" http://www.lincolncentforum.com/misaligned-die-errors-vs-off-center-strikes/ or "Obverse" http://www.coinnews.net/2007/07/10/defining-coin-surfaces-rim-edge-obverse-and-reverse-part-one/ ?