Earlier I ran into problems posting, so I'm going to try to describe the error.

I replied to a thread. I then had another thought, so I hit the "REPLY" word in my own post. I composed a message. I hit preview. I liked the preview, so I went to the underlying window (where I was composing my message), and I hit OK. I got the message "This thread is not replyable". I tried again, got weirder and weirder errors.

Lastly, I clicked "REPLY" on a post, and it came up with a 404 error.

I know this isn't much to go on, but it happened, and I lost a pretty good post I had worked on for a long time describing what a great job Marc has been doing. Really!