Ok, everyone calm down. All the gloom-and-doom types out there are predicting that Barbaro is crashing with laminitis in his good foot. We went straight to the source.
New Bolton Center Chief of Farrier Services Rob Sigafoos reports that the horse does have a minor abscess near the tip of the frog which, to quote Rob, "Could (and does) happen to any horse." Accordingly, Rob "just put the same type of shoe back on and treated the abscess." He did not mention that he put a drain in, and I think he would have commented on that if he had done it.
Stay tuned...