That's strange. I have never had this happen before I I preview alot of posts. I'm really at a loss to even suggest what might have happened there.Finished a rather long post in the BTB section, so I clicked "Preview Post" to make sure everything looked good. However, the textbox below it is now empty, and when I select "Submit reply" I get told "the message you have entered is too short". Does this mean I'll have to compose the post all over again?
In the future please copy any very long post you are about to submit just in case this type of thing happens again.