I’ve found APoD recycles sometimes; APoD selections have been posted twice on a number of occasions, but years apart.
for a bad example:
http://www.freerepublic.com/focus/chat/739270/posts
http://www.freerepublic.com/focus/news/739985/posts
That’s just a double posting on FR; I really have found some.
Okay, so, here’s the same pic, different scale, from the actual APoD site, from 2010 (the ones above are 2002):
http://apod.nasa.gov/apod/ap100131.html