You've probably already got this one, but just in case.
In compose2.php on line 149 there is a space missing between $from_name
and the "<" the correct line should be, (I think) :
if (!empty($my_prefs["email_address"])) $reply_to =3D $from_name."
The effect is visible only when TRUST_USER_ADDRESS=3D0 and causes the
reply-to address to have the user name prepend on to the email address
resulting in something like:
Thanks for a great system.