Other Bulletin Board System (like VBulletin) do it this way: If a user posts something and goes back to their post within a few minutes of posting it, and edit their post, the 'edited by' stamp does not appear at the bottom of the post.... and if the user edits his/her post more than a few minutes later then the edited by stamp will appear.
Currently with webwiz forum, if i was to edit my post the 'edited by' stamp appears at the bottom of my post... no matter how shortly i do it after i posted the message.
My suggestion is to make it so that the 'edited by' appears only if the user edits their post 3 minutes+ after posting the message. Hope this makes sense.