I recently had an issue with being able to publish a post. I could save a draft or preview the post but when I pressed the publish button nothing would happen.
I then began to turn off my plugins one-by-one to see which plugin was the culprit. As it turns out, when I deactivated Jetpack I was able to publish the post.
I'm not sure whether it's the plugin itself or a module within JP but I was wondering if anyone else had experienced this issue.