diff --git a/mod/display.php b/mod/display.php
index 10862d57cc..1f2e18708d 100644
--- a/mod/display.php
+++ b/mod/display.php
@@ -356,11 +356,11 @@ function display_content(App $a, $update = false, $update_uid = 0)
 	$o .= conversation($a, $conversation_items, 'display', $update_uid, false, 'commented', local_user());
 
 	// Preparing the meta header
-	$description = trim(HTML::toPlaintext(BBCode::convert($items["body"], false), 0, true));
-	$title = trim(HTML::toPlaintext(BBCode::convert($items["title"], false), 0, true));
-	$author_name = $items["author-name"];
+	$description = trim(HTML::toPlaintext(BBCode::convert($items[0]["body"], false), 0, true));
+	$title = trim(HTML::toPlaintext(BBCode::convert($items[0]["title"], false), 0, true));
+	$author_name = $items[0]["author-name"];
 
-	$image = $a->remove_baseurl($items["author-thumb"]);
+	$image = $a->remove_baseurl($items[0]["author-avatar"]);
 
 	if ($title == "") {
 		$title = $author_name;
@@ -392,7 +392,7 @@ function display_content(App $a, $update = false, $update_uid = 0)
 	$a->page['htmlhead'] .= '<meta name="twitter:title" content="'.$title.'" />'."\n";
 	$a->page['htmlhead'] .= '<meta name="twitter:description" content="'.$description.'" />'."\n";
 	$a->page['htmlhead'] .= '<meta name="twitter:image" content="'.System::baseUrl().'/'.$image.'" />'."\n";
-	$a->page['htmlhead'] .= '<meta name="twitter:url" content="'.$items["plink"].'" />'."\n";
+	$a->page['htmlhead'] .= '<meta name="twitter:url" content="'.$items[0]["plink"].'" />'."\n";
 
 	// Dublin Core
 	$a->page['htmlhead'] .= '<meta name="DC.title" content="'.$title.'" />'."\n";
@@ -402,7 +402,7 @@ function display_content(App $a, $update = false, $update_uid = 0)
 	$a->page['htmlhead'] .= '<meta property="og:type" content="website" />'."\n";
 	$a->page['htmlhead'] .= '<meta property="og:title" content="'.$title.'" />'."\n";
 	$a->page['htmlhead'] .= '<meta property="og:image" content="'.System::baseUrl().'/'.$image.'" />'."\n";
-	$a->page['htmlhead'] .= '<meta property="og:url" content="'.$items["plink"].'" />'."\n";
+	$a->page['htmlhead'] .= '<meta property="og:url" content="'.$items[0]["plink"].'" />'."\n";
 	$a->page['htmlhead'] .= '<meta property="og:description" content="'.$description.'" />'."\n";
 	$a->page['htmlhead'] .= '<meta name="og:article:author" content="'.$author_name.'" />'."\n";
 	// article:tag
diff --git a/mod/poco.php b/mod/poco.php
index 671551f832..de3b42bb75 100644
--- a/mod/poco.php
+++ b/mod/poco.php
@@ -31,7 +31,7 @@ function poco_init(App $a) {
 		$system_mode = true;
 	}
 
-	$format = (($_GET['format']) ? $_GET['format'] : 'json');
+	$format = defaults($_GET, 'format', 'json');
 
 	$justme = false;
 	$global = false;
@@ -76,11 +76,11 @@ function poco_init(App $a) {
 
 	if ($justme) {
 		$sql_extra = " AND `contact`.`self` = 1 ";
+	} else {
+		$sql_extra = "";
 	}
-//	else
-//		$sql_extra = " AND `contact`.`self` = 0 ";
 
-	if ($cid) {
+	if (!empty($cid)) {
 		$sql_extra = sprintf(" AND `contact`.`id` = %d ", intval($cid));
 	}
 	if (x($_GET, 'updatedSince')) {
@@ -112,8 +112,9 @@ function poco_init(App $a) {
 	} else {
 		$totalResults = 0;
 	}
-	$startIndex = intval($_GET['startIndex']);
-	if (! $startIndex) {
+	if (!empty($_GET['startIndex'])) {
+		$startIndex = intval($_GET['startIndex']);
+	} else {
 		$startIndex = 0;
 	}
 	$itemsPerPage = ((x($_GET, 'count') && intval($_GET['count'])) ? intval($_GET['count']) : $totalResults);
@@ -204,6 +205,10 @@ function poco_init(App $a) {
 	if (is_array($contacts)) {
 		if (DBM::is_result($contacts)) {
 			foreach ($contacts as $contact) {
+				if (!isset($contact['updated'])) {
+					$contact['updated'] = '';
+				}
+
 				if (! isset($contact['generation'])) {
 					if ($global) {
 						$contact['generation'] = 3;
diff --git a/src/Model/Profile.php b/src/Model/Profile.php
index 631ddd2f0d..94d8de572c 100644
--- a/src/Model/Profile.php
+++ b/src/Model/Profile.php
@@ -112,7 +112,7 @@ class Profile
 			}
 		}
 
-		$pdata = self::getByNickname($nickname, $user[0]['uid'], $profile);
+		$pdata = self::getByNickname($nickname, $user['uid'], $profile);
 
 		if (empty($pdata) && empty($profiledata)) {
 			logger('profile error: ' . $a->query_string, LOGGER_DEBUG);
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index ddbda750b9..e37bfae560 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -2746,7 +2746,7 @@ class DFRN
 		}
 
 		$condition = ['uri' => $uri, 'uid' => $importer["importer_uid"]];
-		$item = Item::selectFirst(['id', 'parent', 'contact-id', 'file'], $condition);
+		$item = Item::selectFirst(['id', 'parent', 'contact-id', 'file', 'deleted'], $condition);
 		if (!DBM::is_result($item)) {
 			logger("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " wasn't found.", LOGGER_DEBUG);
 			return;
diff --git a/src/Protocol/OStatus.php b/src/Protocol/OStatus.php
index 40218b0dfd..1c0cffb302 100644
--- a/src/Protocol/OStatus.php
+++ b/src/Protocol/OStatus.php
@@ -55,9 +55,9 @@ class OStatus
 	private static function fetchAuthor($xpath, $context, $importer, &$contact, $onlyfetch)
 	{
 		$author = [];
-		$author["author-link"] = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
-		$author["author-name"] = $xpath->evaluate('atom:author/atom:name/text()', $context)->item(0)->nodeValue;
-		$addr = $xpath->evaluate('atom:author/atom:email/text()', $context)->item(0)->nodeValue;
+		$author["author-link"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
+		$author["author-name"] = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $context);
+		$addr = XML::getFirstNodeValue($xpath, 'atom:author/atom:email/text()', $context);
 
 		$aliaslink = $author["author-link"];
 
@@ -126,7 +126,7 @@ class OStatus
 			$author["author-avatar"] = Probe::fixAvatar(current($avatarlist), $author["author-link"]);
 		}
 
-		$displayname = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
+		$displayname = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 		if ($displayname != "") {
 			$author["author-name"] = $displayname;
 		}
@@ -155,27 +155,27 @@ class OStatus
 			$contact['url'] = $author["author-link"];
 			$contact['nurl'] = normalise_link($contact['url']);
 
-			$value = $xpath->evaluate('atom:author/atom:uri/text()', $context)->item(0)->nodeValue;
+			$value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()', $context);
 			if ($value != "") {
 				$contact["alias"] = $value;
 			}
 
-			$value = $xpath->evaluate('atom:author/poco:displayName/text()', $context)->item(0)->nodeValue;
+			$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()', $context);
 			if ($value != "") {
 				$contact["name"] = $value;
 			}
 
-			$value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $context)->item(0)->nodeValue;
+			$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $context);
 			if ($value != "") {
 				$contact["nick"] = $value;
 			}
 
-			$value = $xpath->evaluate('atom:author/poco:note/text()', $context)->item(0)->nodeValue;
+			$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()', $context);
 			if ($value != "") {
 				$contact["about"] = HTML::toBBCode($value);
 			}
 
-			$value = $xpath->evaluate('atom:author/poco:address/poco:formatted/text()', $context)->item(0)->nodeValue;
+			$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()', $context);
 			if ($value != "") {
 				$contact["location"] = $value;
 			}
@@ -390,7 +390,7 @@ class OStatus
 				$author = self::fetchAuthor($xpath, $entry, $importer, $contact, $stored);
 			}
 
-			$value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $entry)->item(0)->nodeValue;
+			$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()', $context);
 			if ($value != "") {
 				$nickname = $value;
 			} else {
@@ -399,9 +399,9 @@ class OStatus
 
 			$item = array_merge($header, $author);
 
-			$item["uri"] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
+			$item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 
-			$item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
+			$item["verb"] = XML::getFirstNodeValue($xpath, 'activity:verb/text()', $entry);
 
 			// Delete a message
 			if (in_array($item["verb"], ['qvitter-delete-notice', ACTIVITY_DELETE, 'delete'])) {
@@ -561,19 +561,18 @@ class OStatus
 	 */
 	private static function processPost($xpath, $entry, &$item, $importer)
 	{
-		$item["body"] = HTML::toBBCode($xpath->query('atom:content/text()', $entry)->item(0)->nodeValue);
-		$item["object-type"] = $xpath->query('activity:object-type/text()', $entry)->item(0)->nodeValue;
+		$item["body"] = HTML::toBBCode(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
+		$item["object-type"] = XML::getFirstNodeValue($xpath, 'activity:object-type/text()', $entry);
 		if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
-			$item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
-			$item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
+			$item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
+			$item["body"] = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 		} elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
-			$item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
+			$item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
 		}
 
-		$item["created"] = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
-		$item["edited"] = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
-		$conversation = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
-		$item['conversation-uri'] = $conversation;
+		$item["created"] = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
+		$item["edited"] = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
+		$item['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 
 		$conv = $xpath->query('ostatus:conversation', $entry);
 		if (is_object($conv->item(0))) {
@@ -661,7 +660,7 @@ class OStatus
 
 		// Mastodon Content Warning
 		if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
-			$clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
+			$clear_text = XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry);
 			if (!empty($clear_text)) {
 				$item['content-warning'] = HTML::toBBCode($clear_text);
 			}
@@ -787,7 +786,7 @@ class OStatus
 
 			$conv_data['protocol'] = PROTOCOL_SPLITTED_CONV;
 			$conv_data['network'] = NETWORK_OSTATUS;
-			$conv_data['uri'] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
+			$conv_data['uri'] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
 
 			$inreplyto = $xpath->query('thr:in-reply-to', $entry);
 			if (is_object($inreplyto->item(0))) {
@@ -798,8 +797,7 @@ class OStatus
 				}
 			}
 
-			$conv = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
-			$conv_data['conversation-uri'] = $conv;
+			$conv_data['conversation-uri'] = XML::getFirstNodeValue($xpath, 'ostatus:conversation/text()', $entry);
 
 			$conv = $xpath->query('ostatus:conversation', $entry);
 			if (is_object($conv->item(0))) {
@@ -1003,7 +1001,7 @@ class OStatus
 
 		$link_data = [];
 
-		$orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
+		$orig_uri = XML::getFirstNodeValue($xpath, 'atom:id/text()', $activityobjects);
 
 		$links = $xpath->query("atom:link", $activityobjects);
 		if ($links) {
diff --git a/src/Util/Network.php b/src/Util/Network.php
index c3ecaf6060..393b993e35 100644
--- a/src/Util/Network.php
+++ b/src/Util/Network.php
@@ -410,7 +410,7 @@ class Network
 			$matches = [];
 			$new_location_info = @parse_url($curl_info['redirect_url']);
 			$old_location_info = @parse_url($curl_info['url']);
-	
+
 			preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
 			$newurl = trim(array_pop($matches));
 
@@ -654,7 +654,7 @@ class Network
 	public static function stripTrackingQueryParams($url)
 	{
 		$urldata = parse_url($url);
-		if (is_string($urldata["query"])) {
+		if (!empty($urldata["query"])) {
 			$query = $urldata["query"];
 			parse_str($query, $querydata);
 
@@ -838,14 +838,35 @@ class Network
 			return "";
 		}
 
+		if (empty($parts1["scheme"])) {
+			$parts1["scheme"] = '';
+		}
+		if (empty($parts2["scheme"])) {
+			$parts2["scheme"] = '';
+		}
+
 		if ($parts1["scheme"] != $parts2["scheme"]) {
 			return "";
 		}
 
+		if (empty($parts1["host"])) {
+			$parts1["host"] = '';
+		}
+		if (empty($parts2["host"])) {
+			$parts2["host"] = '';
+		}
+
 		if ($parts1["host"] != $parts2["host"]) {
 			return "";
 		}
 
+		if (empty($parts1["port"])) {
+			$parts1["port"] = '';
+		}
+		if (empty($parts2["port"])) {
+			$parts2["port"] = '';
+		}
+
 		if ($parts1["port"] != $parts2["port"]) {
 			return "";
 		}
@@ -856,6 +877,13 @@ class Network
 			$match .= ":".$parts1["port"];
 		}
 
+		if (empty($parts1["path"])) {
+			$parts1["path"] = '';
+		}
+		if (empty($parts2["path"])) {
+			$parts2["path"] = '';
+		}
+
 		$pathparts1 = explode("/", $parts1["path"]);
 		$pathparts2 = explode("/", $parts2["path"]);