Tonight I went to edit this postthis post to fix the link, which the poster had entered in BBcode rather than Markdown. When I went to submit the edit, I got this error message, which I've never seen before:
The error says that posts can't contain that content, nor that title. However, the only thing I modified was the link text, so why was I getting that error when the post obviously contained the rest of that content when it was originally posted?