This and many comments seem to miss the facts, at least as presented on the ABC conjecture's wikipedia page http://en.wikipedia.org/wiki/Abc_conjecture:

- An error was found in 2012 and was just recently (Nov 2014) corrected - He's re-released his notes & lectures on the subject - A workshop will be held on the topic in March

That doesn't seem to be unusual / isolationist behavior, though it's obviously a complicated topic and since Fermat's Last Theorem has been deemed 'solved' already, the fact that it makes a FLT proof easier isn't much appreciated by the press / community.