Note that the fact that Putnam is so very (and almost uniquely) famous for this is evidence that changes of mind like this usually don't happen in philosophy. Do you know to what extent his change of mind was prompted by other people? (I admit I didn't read the paper.)
He is famous not for changing his mind but for changing his mind repeatedly on a number of different theories that he himself brought into prominence, and also for how radical and foundational some of those changes have been. My supervisor used to say that he could delineate six distinct "versions" of Putnam. That is unusual in philosophy, but I don't think mind-changing itself is, at least not more so than in most other intellectual disciplines, including the sciences. Of course, maybe I'm just mistaken about the extent to which mind-changing oc...
Sam Harris is here offering a substantial amount of money to anyone who can show a flaw in the philosophy of 'The Moral Landscape' in 1000 word or less, or at least the best attempt.
http://www.samharris.org/blog/item/the-moral-landscape-challenge1
Up to $20,000 is on offer, although that's only if you change his mind. Whilst we know that this is very difficult, note how few people offer large sums of money for the privelage of being disproven.
In case anyone does win, I will remind you that this site is created and maintained by people who work at MIRI and CFAR, which rely on outside donations, and with whom I am not affiliated.
Note: Is this misplaced in Discussion? I imagine that it could be easily overlooked in an open thread by the sorts of people who would be able to use this information well?