Don’t have a solution, I’m afraid, but I’m experiencing the same issue on my blog. I was courageous enough to push the update directly to the live version of my site instead of going through staging and now I find myself with a platform that doesn’t let me post at all.
@iroller one untested workaround – off the top of my head – would be to edit the post as you normally would, save it as draft, go back to the posts list, quick edit, and change its status to published. That is, if you want to avoid disabling the plug-in until a fix comes around.