diff --git a/include/conversation.php b/include/conversation.php
index 6a6eff28d..93ec728ba 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -717,7 +717,7 @@ function conversation_add_children(array $parents, $block_authors, $order, $uid)
 		$max_comments = DI::config()->get('system', 'max_display_comments', 1000);
 	}
 
-	$params = ['order' => ['uri-id' => true]];
+	$params = ['order' => ['uri-id' => true, 'uid' => true]];
 
 	$activities      = [];
 	$uriids          = [];
diff --git a/src/Model/Item.php b/src/Model/Item.php
index a8105f78c..3e0faddf7 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -1061,7 +1061,7 @@ class Item
 
 		// Create Diaspora signature
 		if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
-			$signed = Diaspora::createCommentSignature($uid, $item);
+			$signed = Diaspora::createCommentSignature($item);
 			if (!empty($signed)) {
 				$item['diaspora_signed_text'] = json_encode($signed);
 			}
diff --git a/src/Model/User.php b/src/Model/User.php
index 94e41387b..55bbb8b84 100644
--- a/src/Model/User.php
+++ b/src/Model/User.php
@@ -157,8 +157,8 @@ class User
 		$system['net-publish'] = false;
 
 		// Ensure that the user contains data
-		$user = DBA::selectFirst('user', ['prvkey'], ['uid' => 0]);
-		if (empty($user['prvkey'])) {
+		$user = DBA::selectFirst('user', ['prvkey', 'guid'], ['uid' => 0]);
+		if (empty($user['prvkey']) || empty($user['guid'])) {
 			$fields = [
 				'username' => $system['name'],
 				'nickname' => $system['nick'],
@@ -167,12 +167,17 @@ class User
 				'prvkey' => $system['prvkey'],
 				'spubkey' => $system['spubkey'],
 				'sprvkey' => $system['sprvkey'],
+				'guid' => System::createUUID(),
 				'verified' => true,
 				'page-flags' => User::PAGE_FLAGS_SOAPBOX,
 				'account-type' => User::ACCOUNT_TYPE_RELAY,
 			];
 
 			DBA::update('user', $fields, ['uid' => 0]);
+
+			$system['guid'] = $fields['guid'];
+		} else {
+			$system['guid'] = $user['guid'];
 		}
 
 		return $system;
diff --git a/src/Module/Xrd.php b/src/Module/Xrd.php
index 7e380946f..d2813cc27 100644
--- a/src/Module/Xrd.php
+++ b/src/Module/Xrd.php
@@ -130,6 +130,25 @@ class Xrd extends BaseModule
 					'rel'      => 'http://ostatus.org/schema/1.0/subscribe',
 					'template' => DI::baseUrl()->get() . '/follow?url={uri}',
 				],
+				[
+					'rel'  => ActivityNamespace::FEED,
+					'type' => 'application/atom+xml',
+					'href' => $owner['poll'] ?? DI::baseUrl()->get(),
+				],
+				[
+					'rel'  => 'salmon',
+					'href' => DI::baseUrl()->get() . '/salmon/' . $owner['nickname'],
+				],
+				[
+					'rel'  => 'http://microformats.org/profile/hcard',
+					'type' => 'text/html',
+					'href' => DI::baseUrl()->get() . '/hcard/' . $owner['nickname'],
+				],
+				[
+					'rel'  => 'http://joindiaspora.com/seed_location',
+					'type' => 'text/html',
+					'href' => DI::baseUrl()->get(),
+				],
 			]
 		];
 		header('Access-Control-Allow-Origin: *');
diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index 1c0ecc300..c07cc7e60 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -1412,6 +1412,8 @@ class Probe
 				$data["guid"] = $link["href"];
 			} elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && (($link["type"] ?? "") == "text/html") && !empty($link["href"])) {
 				$data["url"] = $link["href"];
+			} elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && empty($link["type"]) && !empty($link["href"])) {
+				$profile_url = $link["href"];
 			} elseif (($link["rel"] == ActivityNamespace::FEED) && !empty($link["href"])) {
 				$data["poll"] = $link["href"];
 			} elseif (($link["rel"] == ActivityNamespace::POCO) && !empty($link["href"])) {
@@ -1428,6 +1430,10 @@ class Probe
 			}
 		}
 
+		if (empty($data["url"]) && !empty($profile_url)) {
+			$data["url"] = $profile_url;
+		}
+
 		if (empty($data["url"]) || empty($hcard_url)) {
 			return [];
 		}
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 53140521d..485e5a784 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -4044,14 +4044,30 @@ class Diaspora
 	/**
 	 * Creates the signature for Comments that are created on our system
 	 *
-	 * @param integer $uid  The user of that comment
 	 * @param array   $item Item array
 	 *
 	 * @return array Signed content
 	 * @throws \Exception
 	 */
-	public static function createCommentSignature($uid, array $item)
+	public static function createCommentSignature(array $item)
 	{
+		if (!empty($item['author-link'])) {
+			$url = $item['author-link'];
+		} else {
+			$contact = Contact::getById($item['author-id'], ['url']);
+			if (empty($contact['url'])) {
+				Logger::warning('Author Contact not found', ['author-id' => $item['author-id']]);
+				return false;
+			}
+			$url = $contact['url'];
+		}
+
+		$uid = User::getIdForURL($url);
+		if (empty($uid)) {
+			Logger::info('No owner post, so not storing signature', ['url' => $contact['url']]);
+			return false;
+		}
+
 		$owner = User::getOwnerDataById($uid);
 		if (empty($owner)) {
 			Logger::info('No owner post, so not storing signature');