[Xenon]

oh right, it's in the install file *gg*
(sometimes i forgot what i've already included in the hacks ^^)

PHP Code:

              if ($showeditedby and $lastpost[dateline]<(time()-($noeditedbytime*60))) {
                 $editedbysql=",edituserid='$bbuserinfo[userid]',editdate='".time()."'";
              } 


it's in there, so it should show the edited by after 2 minutes with the original code...
be sure you have enabled the showedited by thing..