This made me laugh out loud.
Moody's, the corporation that ranks the credit ratings of big-time Wall Street borrowers and investors (conflict of interest, anyone?), discovered a "bug" (read as, bad programming) in their computer models used to assess Triple-A Ratings. Moody's gave Triple-A Ratings to any securities product under the sun. Even after discovering the error in early 2007, it took them a whole year to remove Triple-A status to the products.
Another example of the "invisible hand" of the free market spanking us on the ass, perhaps?