[ringleader]

I wouldn't have even noticed. And my members are dumb enough to do this.

Find in payments.php:

Instead of (as provided)

    //=== HACK: GIFT SUBSCRIPTIONS ===//
    if ($_POST['giftname']!=$vbulletin->userinfo['username']) {
	 $goo=$db->query_read_slave("SELECT userid from ". TABLE_PREFIX ."user where username='".$_POST['giftname']."'");
       while ($giftee = $db->fetch_array($goo)) 
		{ $subid=$giftee['userid']; }
    }
    else { 
    	$subid=$vbulletin->userinfo['userid']; 
    }
    //=== HACK: GIFT SUBSCRIPTIONS ===//

Use this code that checks the member name and includes an error message

("Invalid recipient username. Please press the back button, enter the correct username and try again. <u>Click Here to See the Members List</u>"):

    //=== HACK: GIFT SUBSCRIPTIONS ===//
	if ($_POST['giftname'] != $vbulletin->userinfo['username']) 
	{
		$goo=$db->query_read_slave("SELECT userid from ". TABLE_PREFIX ."user where username='".$_POST['giftname']."'");

		if ($giftee = $db->fetch_array($goo)) 
		{ 
			$subid = $giftee['userid']; 
		}	
		else
		{
			eval(standard_error(fetch_error('pminvalidrecipient')));		
		}
	}
	else 
	{ 
    		$subid = $vbulletin->userinfo['userid']; 
	}
    //=== HACK: GIFT SUBSCRIPTIONS ===//