3.9.1 is not saving pages properly

After searching everywhere for the reason that pages are not updating properly, I found nothing But don’t panic messages. Well I am not panicking but a little disappointed that 3.9.1 was released without proper checks. I have been unable to save changes properly to pages since the update, this is only on our single Sites, the Multi site is fine.

I do an update to a page, Click Publish and half my update or the original page vanishes in to thin air and is not in the auto save either.
I have used Word press for years so I do know what I am doing.

So after many frustrating days, last night I did 2 clean installs, one on the site were updating and one on my test bed, both with no Plugins installed and running twenty fourteen theme, and guess what, it still wont save the pages, if I copy paste into to Non Visual and hit Publish it only saves about the top 25 lines.

So there is an issue with 3.9.1 somewhere.