Hello,
I had been using Cornerstone and X Theme with the same version since april 2016, with no problems.
Today I updated many plugins and my site is wrecked. I imagine that waiting was a bad idea, however now that my site is setup using Cornerstone 1.2.3 or something around April 2016, the new upgrade of X is quite a change. There are many things that could be wrong so I hope you can get us started in the right direction.
Thanks,
Dan