In itself that would only be slightly embarrassing- I am sure most newspapers had two versions of the story written up and waited on the verdict to see which one to use. What makes the Daily Mail's story interesting is the use of quotes in their since retracted story:
Prosecutors were delighted with the verdict and said "Justice has been done" although they said on a "human factor it was sad two young people would be spending years in jail"Now because we now know Knox and her male accomplice no one cares about were in fact released it is clear that the prosecutors did not say any of these things. The Daily Mail was intending to use a piece with fabricated quotes in other words- doing a Hari as it were.
So either the reporter- Nick Pisa- made them up off his own bat or the Daily Mail routinely make things up for the sake of a better story. I do not believe that we are going to hear about an investigation into Pisa's work by a shocked Daily Mail editor any time soon.