Hi micro,
I'm not sure how this happened, but I thought you'd be interested to see a screen shot. Sorry for the tiny size, but I had to do that, to get most of the page into view. It's the 2 Previews on the same page with the text editor, that I think is unusual.

As I said, I don't remember what I did to cause this, and I don't really have a question. Just thought you'd like to know it happened -- FYI!!

All best

Are you sure you hadn't already posted it?

phpBB3 seems to take note of the time you hit "reply" and if someone else posts whilst you are typing your message their message will appear above the preview so you are aware there has been a new reply to the topic. At least this is what I'm sure has happened to me--this situation hasn't happened often.

In any case, if it is a glitch, I'm not too concerned until it becomes repeatabled.

Thanks for reporting it.