I was working on an article and I wanted to put something in blockquotes, so I edited the HTML. When I updated and got out of it, the rest of my post was mysteriously italicized,
<em> added every line -- twice! Then I discovered that it had changed ALL of my previous posts the same way, but only below the line that I had block quoted. Removing the tags had no effect. Any explanation? I'd LOVE to undo this, but when it comes to WP and HTML I have only a service-level knowledge.