Excerpt from the apology (Via Miami NewTimes Blog):
"...This error should not have happened and will not happen again, especially as we pride ourselves on creating an environment that cultivates and respects innovators such as DJ Shadow...."
At least they apologized about the incident. But what would be cool is to re-book DJ Shadow in 2013 and offer all of those that were there for the first event free entry. If they did that then I would be really impressed.