Donna,
I think if a group member makes a mistake that changes the meaning of
what he or she intended, a new message should be written.
I'm curious: why?
Sending a new message doesn't reduce the "clutter" of having both versions of the message in one's inbox. And it can be more confusing if the member doesn't clearly state that the new message is an edit of the old one. At least with the Edit feature the new version is clearly marked as an edit.
I come across many edited posts in the beta group in the digests which I
get. Often, I can't tell what is changed. Sometimes, even comparing
the edited message with the non-edited message, it is difficult for me
to tell.
I find the easiest way to find out, if I care, is to click through to the message on the group's web page and then click the Edited badge that appears near the upper right (under the date/time of the post).
That gives you a list of revisions, and a button to compare them. Inserted text is shown with an underline and a green highlight, deleted text is shown in strike-through with a red highlight.
-- Shal
Shal Farley