diff --git a/include/notifier.php b/include/notifier.php
index fe1925c337..40fdbcc5f7 100644
--- a/include/notifier.php
+++ b/include/notifier.php
@@ -266,12 +266,12 @@
 		if($rr['self'])
 			continue;
 
-		if(! strlen($rr['dfrn-id']))
+		if((! strlen($rr['dfrn-id'])) || ($rr['duplex'] && ! strlen($rr['issued-id'])))
 			continue;
 
+		$idtosend = (($rr['duplex']) ? $rr['issued-id'] : $rr['dfrn-id']);
 
-
-		$url = $rr['notify'] . '?dfrn_id=' . $rr['dfrn-id'];
+		$url = $rr['notify'] . '?dfrn_id=' . $idtosend;
 
 		$xml = fetch_url($url);
 
@@ -288,25 +288,31 @@
 
 		$postvars = array();
 		$sent_dfrn_id = hex2bin($res->dfrn_id);
-
+		$challenge = hex2bin($res->challenge);
 		$final_dfrn_id = '';
-		openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$rr['pubkey']);
+
+		if($rr['duplex']) {
+			openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$rr['prvkey']);
+			openssl_private_decrypt($challenge,$postvars['challenge'],$rr['prvkey']);
+		}
+		else {
+			openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$rr['pubkey']);
+			openssl_public_decrypt($challenge,$postvars['challenge'],$rr['pubkey']);
+		}
+
 		$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
-		if($final_dfrn_id != $rr['dfrn-id']) {
+		if(($final_dfrn_id != $rr['dfrn-id']) || (($rr['duplex']) && ($final_dfrn_id != $rr['issued-id']))) {
 			// did not decode properly - cannot trust this site 
 			continue;
 		}
 
-		$postvars['dfrn_id'] = $rr['dfrn-id'];
-
-		$challenge = hex2bin($res->challenge);
-
-		openssl_public_decrypt($challenge,$postvars['challenge'],$rr['pubkey']);
+		$postvars['dfrn_id'] = (($duplex) ? $rr['issued-id'] : $rr['dfrn-id']);
 
 		if($cmd == 'mail') {
 			$postvars['data'] = $atom;
 		}
-		elseif(strlen($rr['dfrn-id']) && (! ($rr['blocked']) || ($rr['readonly']))) {
+		elseif(((strlen($rr['dfrn-id'])) || (($rr['duplex']) && (strlen($rr['issued-id'])))) 
+			&& (! ($rr['blocked']) || ($rr['readonly']))) {
 			$postvars['data'] = $atom;
 		}
 		else {
diff --git a/include/poller.php b/include/poller.php
index f771a3af4b..96c6472786 100644
--- a/include/poller.php
+++ b/include/poller.php
@@ -1,27 +1,25 @@
 <?php
 
 
-require_once('boot.php');
+	require_once('boot.php');
 
-$a = new App;
-
-@include('.htconfig.php');
-require_once('dba.php');
-$db = new dba($db_host, $db_user, $db_pass, $db_data);
-	unset($db_host, $db_user, $db_pass, $db_data);
-
-require_once('session.php');
-require_once('datetime.php');
-require_once('simplepie/simplepie.inc');
-require_once('include/items.php');
+	$a = new App;
 
+	@include('.htconfig.php');
+	require_once('dba.php');
+	$db = new dba($db_host, $db_user, $db_pass, $db_data);
+		unset($db_host, $db_user, $db_pass, $db_data);
 
+	require_once('session.php');
+	require_once('datetime.php');
+	require_once('simplepie/simplepie.inc');
+	require_once('include/items.php');
 
 	$a->set_baseurl(get_config('system','url'));
 
 	$contacts = q("SELECT * FROM `contact` 
-		WHERE `dfrn-id` != '' AND `self` = 0 AND `blocked` = 0 
-		AND `readonly` = 0 ORDER BY RAND()");
+		WHERE ( `dfrn-id` != '' OR (`issued-id` != '' AND `duplex` = 1)) 
+		AND `self` = 0 AND `blocked` = 0 AND `readonly` = 0 ORDER BY RAND()");
 
 	if(! count($contacts))
 		killme();
@@ -75,11 +73,15 @@ require_once('include/items.php');
 			? datetime_convert('UTC','UTC','now - 30 days','Y-m-d\TH:i:s\Z')
 			: datetime_convert('UTC','UTC',$contact['last-update'],'Y-m-d\TH:i:s\Z'));
 
-		$url = $contact['poll'] . '?dfrn_id=' . $contact['dfrn-id'] . '&type=data&last_update=' . $last_update ;
+		$idtosend = (($contact['duplex']) ? $contact['issued-id'] : $contact['dfrn-id']);
+
+		$url = $contact['poll'] . '?dfrn_id=' . $idtosend . '&type=data&last_update=' . $last_update ;
 
 		$xml = fetch_url($url);
+
 echo "URL: " . $url;
 echo "XML: " . $xml;
+
 		if(! $xml)
 			continue;
 
@@ -91,19 +93,28 @@ echo "XML: " . $xml;
 		$postvars = array();
 
 		$sent_dfrn_id = hex2bin($res->dfrn_id);
+		$challenge    = hex2bin($res->challenge);
 
 		$final_dfrn_id = '';
-		openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
+
+		if($contact['duplex']) {
+			openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
+			openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
+
+		}
+		else {
+			openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
+			openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
+		}
+
 		$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
-		if($final_dfrn_id != $contact['dfrn-id']) {
+		if(($final_dfrn_id != $contact['dfrn-id']) 
+			|| (($contact['duplex']) && ($final_dfrn_id != $contact['issued-id']))) {
 			// did not decode properly - cannot trust this site 
 			continue;
 		}
 
-		$postvars['dfrn_id'] = $contact['dfrn-id'];
-		$challenge = hex2bin($res->challenge);
-
-		openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
+		$postvars['dfrn_id'] = (($contact['duplex']) ? $contact['issued-id'] : $contact['dfrn-id']);
 
 		$xml = post_url($contact['poll'],$postvars);
 
diff --git a/mod/dfrn_notify.php b/mod/dfrn_notify.php
index 3e98377e88..7cab98eb8e 100644
--- a/mod/dfrn_notify.php
+++ b/mod/dfrn_notify.php
@@ -23,7 +23,10 @@ function dfrn_notify_post(&$a) {
 
 	// find the local user who owns this relationship.
 
-	$r = q("SELECT `contact`.*, `contact`.`uid` AS `importer_uid`, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` WHERE `issued-id` = '%s' LIMIT 1",
+	$r = q("SELECT `contact`.*, `contact`.`uid` AS `importer_uid`, `user`.* FROM `contact` 
+		LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` 
+		WHERE ( `issued-id` = '%s' OR ( `duplex` = 1 AND `dfrn-id` = '%s' )) LIMIT 1",
+		dbesc($dfrn_id),
 		dbesc($dfrn_id)
 	);
 
@@ -341,20 +344,28 @@ function dfrn_notify_content(&$a) {
 			intval(time() + 60 )
 		);
 
-		$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `blocked` = 0 AND `pending` = 0 LIMIT 1",
-			dbesc($_GET['dfrn_id']));
-		if((! count($r)) || (! strlen($r[0]['prvkey'])))
+		$r = q("SELECT * FROM `contact` WHERE ( `issued-id` = '%s' OR ( `duplex` = 1 AND `dfrn-id` = '%s'))
+			AND `blocked` = 0 AND `pending` = 0 LIMIT 1",
+			dbesc($_GET['dfrn_id']),
+			dbesc($_GET['dfrn_id'])
+		);
+		if(! count($r))
 			$status = 1;
 
 		$challenge = '';
-
-		openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
-		$challenge = bin2hex($challenge);
-
 		$encrypted_id = '';
 		$id_str = $_GET['dfrn_id'] . '.' . mt_rand(1000,9999);
 
-		openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
+		if($r[0]['duplex']) {
+			openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
+			openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
+		}
+		else {
+			openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
+			openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
+		}
+
+		$challenge    = bin2hex($challenge);
 		$encrypted_id = bin2hex($encrypted_id);
 
 		echo '<?xml version="1.0" encoding="UTF-8"?><dfrn_notify><status>' .$status . '</status><dfrn_id>' . $encrypted_id . '</dfrn_id>' . '<challenge>' . $challenge . '</challenge></dfrn_notify>' . "\r\n" ;
diff --git a/mod/dfrn_poll.php b/mod/dfrn_poll.php
index c627c2b418..84cb58da0d 100644
--- a/mod/dfrn_poll.php
+++ b/mod/dfrn_poll.php
@@ -25,8 +25,11 @@ function dfrn_poll_init(&$a) {
 
 		$r = q("SELECT `contact`.*, `user`.`nickname` 
 			FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
-			WHERE `dfrn-id` = '%s' LIMIT 1",
-			dbesc($dfrn_id));
+			WHERE ( `dfrn-id` = '%s' OR ( `issued-id` = '%s' AND `duplex `= 1 )) LIMIT 1",
+			dbesc($dfrn_id),
+			dbesc($dfrn_id)
+		);
+
 		if(count($r)) {
 			$s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $dfrn_id . '&type=profile-check');
 			if(strlen($s)) {
@@ -87,9 +90,11 @@ function dfrn_poll_post(&$a) {
 	);
 
 
-	$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' LIMIT 1",
+	$r = q("SELECT * FROM `contact` WHERE ( `issued-id` = '%s' OR ( `dfrn-id` = '%s' AND `duplex` = 1 )) LIMIT 1",
+		dbesc($dfrn_id),
 		dbesc($dfrn_id)
 	);
+
 	if(! count($r))
 		killme();
 
@@ -165,23 +170,32 @@ function dfrn_poll_content(&$a) {
 			dbesc($last_update)
 		);
 
-		$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `blocked` = 0 AND `pending` = 0 LIMIT 1",
-			dbesc($_GET['dfrn_id']));
-		if((count($r)) && (strlen($r[0]['prvkey']))) {
+		$r = q("SELECT * FROM `contact` WHERE ( `issued-id` = '%s' OR ( `dfrn-id` = '%s' AND `duplex` = 1 )) 
+			AND `blocked` = 0 AND `pending` = 0 LIMIT 1",
+			dbesc($_GET['dfrn_id']),
+			dbesc($_GET['dfrn_id'])
+		);
+		if(count($r)) {
 
 			$challenge = '';
-
-			openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
-			$challenge = bin2hex($challenge);
-
 			$encrypted_id = '';
 			$id_str = $_GET['dfrn_id'] . '.' . mt_rand(1000,9999);
 
-			openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
+
+			if($r[0]['duplex']) {
+				openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
+				openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
+			}
+			else {
+				openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
+				openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
+			}
+
+			$challenge = bin2hex($challenge);
 			$encrypted_id = bin2hex($encrypted_id);
 		}
 		else {
-			$status = 1;  // key not found
+			$status = 1;
 		}
 
 		echo '<?xml version="1.0" encoding="UTF-8"?><dfrn_poll><status>' .$status . '</status><dfrn_id>' . $encrypted_id . '</dfrn_id>'
@@ -189,11 +203,6 @@ function dfrn_poll_content(&$a) {
 		session_write_close();
 		exit;		
 	}
-
-
-
-
-
 }
 
 
diff --git a/mod/redir.php b/mod/redir.php
index ea1aec6e90..88b291146b 100644
--- a/mod/redir.php
+++ b/mod/redir.php
@@ -4,17 +4,20 @@ function redir_init(&$a) {
 
 	if((! local_user()) || (! ($a->argc == 2)) || (! intval($a->argv[1])))
 		goaway($a->get_baseurl());
-	$r = q("SELECT `issued-id`, `poll` FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
+	$r = q("SELECT `issued-id`, `dfrn-id`, `duplex`, `poll` FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 		intval($a->argv[1]),
 		intval($_SESSION['uid']));
 	if(! count($r))
 		goaway($a->get_baseurl());
+
+	$dfrn_id = (($r[0]['duplex']) ? $r[0]['dfrn-id'] : $r[0]['issued-id']);
+
 	q("INSERT INTO `profile_check` ( `uid`, `dfrn_id`, `expire`)
 		VALUES( %d, '%s', %d )",
 		intval($_SESSION['uid']),
-		dbesc($r[0]['issued-id']),
+		dbesc($dfrn_id),
 		intval(time() + 45));
-	goaway ($r[0]['poll'] . '?dfrn_id=' . $r[0]['issued-id'] . '&type=profile');
+	goaway ($r[0]['poll'] . '?dfrn_id=' . $dfrn_id . '&type=profile');
 
 	
 	
diff --git a/view/atom_feed.tpl b/view/atom_feed.tpl
index b77b146463..316fcb10ba 100644
--- a/view/atom_feed.tpl
+++ b/view/atom_feed.tpl
@@ -2,20 +2,16 @@
 <feed xmlns="http://www.w3.org/2005/Atom"
       xmlns:thr="http://purl.org/syndication/thread/1.0"
       xmlns:at="http://purl.org/atompub/tombstones/1.0"
+      xmlns:media="http://purl.org/syndication/atommedia"
       xmlns:dfrn="http://purl.org/macgirvin/dfrn/1.0" 
       xmlns:as="http://activitystrea.ms/spec/1.0/" >
 
   <id>$feed_id</id>
   <title>$feed_title</title>
-  <icon>$photo</icon>
-  <dfrn:icon-updated>$picdate</dfrn:icon-updated>
   <updated>$feed_updated</updated>
 
   <author>
-    <name>$name</name>
-    <dfrn:name-updated>$namdate</dfrn:name-updated>
-    <uri>$profile_page</uri>
-    <dfrn:uri-updated>$uridate</dfrn:uri-updated>
-    <dfrn:avatar>$thumb</dfrn:avatar>
-    <dfrn:avatar-updated>$picdate</dfrn:avatar-updated>
- </author>
+    <name dfrn:updated="$namdate" >$name</name>
+    <uri dfrn:updated="$uridate" >$profile_page</uri>
+    <link rel="photo" type="image/jpeg" dfrn:updated="$picdate" href="$thumb" />
+  </author>
diff --git a/view/atom_item.tpl b/view/atom_item.tpl
index 1dae06db56..8104cfaa5a 100644
--- a/view/atom_item.tpl
+++ b/view/atom_item.tpl
@@ -2,19 +2,19 @@
 		<author>
 			<name>$name</name>
 			<uri>$profile_page</uri>
-			<dfrn:avatar>$thumb</dfrn:avatar>
+			<link rel="photo" type="image/jpeg" href="$thumb" />
 		</author>
 		<dfrn:owner>
 			<dfrn:name>$owner_name</dfrn:name>
 			<dfrn:uri>$owner_profile_page</dfrn:uri>
-			<dfrn:avatar>$owner_thumb</dfrn:avatar>
+			<link rel="photo" type="image/jpeg" href="$owner_thumb" />
 		</dfrn:owner>
 
 		<id>$item_id</id>
 		<title>$title</title>
 		<published>$published</published>
 		<updated>$updated</updated>
-		<content>$content</content>
+		<content type="$type" >$content</content>
 		<dfrn:location>$location</dfrn:location>
 		<dfrn:comment-allow>$comment_allow</dfrn:comment-allow>
 	</entry>