Must be at most 200 characters

When I tried to publish my latest post, this error messange appears: Must be at most 200 characters. The first thing that come across my mind is to shorten my post. On the second thought, shorten to 200 characters? :)

The error message is for labels, not posts. If you received this error message, shorten you labels and publish. If you still can't publish, save it as draft, then publish. If still doesn't work, copy you post in Notepad, turn off your browser, clean the cookies, and try publising it again.

Hope this post will help someone... or tell me if I'm mistaken.