Block replies if someone else posted in the meanwhile

It happens very often that 2-3 people post a very similar reply within the same minute or so. It would be nice that when replying to a thread, if someone else posted in the meanwhile, your post gets blocked with a warning like "Wait, the thread has changed while you were writing your post", allowing people to read what has just been posted and (eventually) change or discard their replies.

It is already discussed here in the forum:

http://developer.qt.nokia.com/forums/viewthread/2623