On Tue, 03 Dec 2013 11:49:14 +0100, Sönke Ludwig wrote:

One idea would be to instead delete the old post and create a new one,
but that can only work as long as there are no replies to that message,
yet, or it will break threading. Also, there is also no notification
mechanism for deleted messages and it introduces race-conditions with
other posters who might be replying to the original post, so this also
won't be pretty either.

Even that is better than nothing. :) Could we make it editable as long as there are no replies?