I can hardly call this a mod - so I will post it here if the moderator of this forum wishes to move it he can

In showflat.php & showthreaded.php

Find this....

// Load the quickreply template?
$quickreply = "";
$quickdisplay = "style="display: none;"";
if (($config['quickreply']) && ($reply == "on")) {
$qboard = $Board;

Replace with this...

// Load the quickreply template?
$quickreply = "";
$quickdisplay = "style="display: none;"";
if (($config['quickreply']) && ($user['U_Username']) && ($reply == "on")) {
$qboard = $Board;


Seems to do the trick