Those of you who have experienced the browser problem with the preview page, whereby hitting the 'back' button to made corrections ends up with the whole message lost, should not experience this again. I've replicated the "post message" form on the preview page, so that, in the future, if you have a correction to make to a post you are previewing, you can simply scroll down to make the corrections rather than hitting the browser's "back" button.

If you do hit the browser's "back" button by mistake and lose your post, you simply hit the "forward" button to get back to the preview page, and reload that page if necessary.

I should have done this a long time ago.