Just found this article on the epidemic of foot injuries from barefoot running.
http://running.competitor.com/2010/0...epidemic_10118

Both Daniel Lieberman and Christopher McDougall (the dude who wrote "Born to Run") recently developed metatarsal stress fractures from running barefoot (McDougall) and in VFF (Lieberman). Rather difficult to say those two didn't ease into barefoot running properly...

(a piece of irony the author of this article missed)