According to the official blog, director Yamamoto Yutaka
will close his blog taking the responsibility for making a reckless announcement of his immediate retirement provoked by an anonymous inflammatory comment on the blog. He was harshly reprimanded by Noitamina producers Isoda and Shimizu and has withdrawn his retirement.
The dispute began when an anonymous person posted a provocative comment on Yamamoto's blog that "Stop relying on other creators' works. Why don't you produce your own original anime? If it fails, then quit the anime industry without making disgraceful excuses." Yamamoto replied "I'll retire right now if you want me to. On no conditions what-so-ever. I promise."
Director Yamamoto has repeatedly stated in public that he will retire if Fractale
Source: Yamakan's blog