Yes, mochizuki and the abc conjecture. It was an interesting conundrum : he was a really good mathematician, not a crank so his funky proof couldn't be dismisse

Yes, mochizuki and the abc conjecture. It was an interesting conundrum : he was a really good mathematician, not a crank so his funky proof couldn't be dismissed. However, people were wary of approaching the proof since it was risky career wise (it takes time, etc). You end up with a weird situation where something is probably true, but you won't know that until a trusted group of mathematicians have read it and said so.