>>No it's not new. Happenned to me a few times in the last two months. That's why (I think) Michel added a new update button.
>
>Really? I thought I did it the other day. IAC, I liked the old behaviour better.

We never changed anything in regards to that. It's browser specific. That's why we added a Update and Send buttons. So, if you preview, continue with Update to update before sending. By that, you won't loose it.