Over the last couple of days I have occasionally been prevented from publishing posts. I get a Javascript message saying “Failed to post. Please try again”. Trying again does not resolve the issue.
This happened to me two days ago, also in the evening (UK time). I left the post unpublished in the browser and it published okay the next morning. It happened to me again just now, so I don’t know if the timing makes a difference.
I normally create my drafts as Posts before moving them to my Blog so I don’t know if this would impact publishing directly to my public blog.
This is different from the ‘you’re publishing too much’ behaviour which I occasionally get.