in invite_friends.tpl

Code:
<h2>Welcome to {$site_name}, {$username}!</h2>
should be:

Code:
<h2>Welcome to {$site_name}, {$smarty.session.USERNAME}!</h2>
Was reported to be fixed with release 2.6, but it's still there.viewtopic.php?f=11&t=2172&p=9439#p9439