diff --git a/buffer/buffer.php b/buffer/buffer.php
index f41ecf97..9d14fd83 100644
--- a/buffer/buffer.php
+++ b/buffer/buffer.php
@@ -271,6 +271,7 @@ function buffer_send(App $a, &$b)
 	$client_id = Config::get("buffer", "client_id");
 	$client_secret = Config::get("buffer", "client_secret");
 	$access_token = PConfig::get($b['uid'], "buffer","access_token");
+	$callback_url = "";
 
 	if ($access_token) {
 		$buffer = new BufferApp($client_id, $client_secret, $callback_url, $access_token);
diff --git a/leistungsschutzrecht/leistungsschutzrecht.php b/leistungsschutzrecht/leistungsschutzrecht.php
index 6cfe95fe..e608409b 100644
--- a/leistungsschutzrecht/leistungsschutzrecht.php
+++ b/leistungsschutzrecht/leistungsschutzrecht.php
@@ -142,6 +142,10 @@ function leistungsschutzrecht_is_member_site($url) {
 		return false;
 	}
 
+	if (count($hostname) <= 2) {
+		return false;
+	}
+
 	$site = $hostname[sizeof($hostname) - 2].".".$hostname[sizeof($hostname) - 1];
 
 	return (isset($sites[$site]));
diff --git a/pumpio/pumpio.php b/pumpio/pumpio.php
index 9e02a74d..5c28a8f4 100644
--- a/pumpio/pumpio.php
+++ b/pumpio/pumpio.php
@@ -983,10 +983,24 @@ function pumpio_dolike(&$a, $uid, $self, $post, $own_id, $threadcompletion = tru
 
 function pumpio_get_contact($uid, $contact, $no_insert = false)
 {
-	GContact::update(["url" => $contact->url, "network" => NETWORK_PUMPIO, "generation" => 2,
-			"photo" => $contact->image->url, "name" => $contact->displayName,  "hide" => true,
-			"nick" => $contact->preferredUsername, "location" => $contact->location->displayName,
-			"about" => $contact->summary, "addr" => str_replace("acct:", "", $contact->id)]);
+	$gcontact = ["url" => $contact->url, "network" => NETWORK_PUMPIO, "generation" => 2,
+		"name" => $contact->displayName,  "hide" => true,
+		"nick" => $contact->preferredUsername,
+		"addr" => str_replace("acct:", "", $contact->id)];
+
+	if (!empty($contact->location->displayName)) {
+		$gcontact["location"] = $contact->location->displayName;
+	}
+
+	if (!empty($contact->summary)) {
+		$gcontact["about"] = $contact->summary;
+	}
+
+	if (!empty($contact->image->url)) {
+		$gcontact["photo"] = $contact->image->url;
+	}
+
+	GContact::update($gcontact);
 	$cid = Contact::getIdForURL($contact->url, $uid);
 
 	if ($no_insert) {
@@ -1047,7 +1061,9 @@ function pumpio_get_contact($uid, $contact, $no_insert = false)
 		*/
 	}
 
-	Contact::updateAvatar($contact->image->url, $uid, $contact_id);
+	if (!empty($contact->image->url)) {
+		Contact::updateAvatar($contact->image->url, $uid, $contact_id);
+	}
 
 	return $contact_id;
 }
@@ -1109,6 +1125,8 @@ function pumpio_dopost(&$a, $client, $uid, $self, $post, $own_id, $threadcomplet
 		$receiptians = array_merge($receiptians, $post->to);
 	}
 
+	$public = false;
+
 	foreach ($receiptians AS $receiver) {
 		if (is_string($receiver->objectType) && ($receiver->id == "http://activityschema.org/collection/public")) {
 			$public = true;
diff --git a/statusnet/statusnet.php b/statusnet/statusnet.php
index 6fc5b8a9..62c3f41b 100644
--- a/statusnet/statusnet.php
+++ b/statusnet/statusnet.php
@@ -586,11 +586,11 @@ function statusnet_post_hook(App $a, &$b)
 			logger('statusnet_post send, result: ' . print_r($result, true) .
 				"\nmessage: " . $msg, LOGGER_DEBUG . "\nOriginal post: " . print_r($b, true) . "\nPost Data: " . print_r($postdata, true));
 
-			if ($result->source) {
+			if (!empty($result->source)) {
 				PConfig::set($b["uid"], "statusnet", "application_name", strip_tags($result->source));
 			}
 
-			if ($result->error) {
+			if (!empty($result->error)) {
 				logger('Send to GNU Social failed: "' . $result->error . '"');
 			} elseif ($iscomment) {
 				logger('statusnet_post: Update extid ' . $result->id . " for post id " . $b['id']);
@@ -819,7 +819,7 @@ function statusnet_fetchtimeline(App $a, $uid)
 				continue;
 			}
 
-			if (is_object($post->retweeted_status)) {
+			if (!empty($post->retweeted_status)) {
 				continue;
 			}
 
@@ -1554,12 +1554,12 @@ function statusnet_is_retweet(App $a, $uid, $body)
 
 	$link = "";
 	preg_match("/link='(.*?)'/ism", $attributes, $matches);
-	if ($matches[1] != "") {
+	if (!empty($matches[1])) {
 		$link = $matches[1];
 	}
 
 	preg_match('/link="(.*?)"/ism', $attributes, $matches);
-	if ($matches[1] != "") {
+	if (!empty($matches[1])) {
 		$link = $matches[1];
 	}
 
diff --git a/tumblr/tumblr.php b/tumblr/tumblr.php
index b2dec5b5..9617a3a0 100644
--- a/tumblr/tumblr.php
+++ b/tumblr/tumblr.php
@@ -412,7 +412,7 @@ function tumblr_send(&$a,&$b) {
 			$params['caption'] = '<h1>'.$title."</h1>".
 						"<p>".$params['caption']."</p>";
 
-		if (trim($params['caption']) == "")
+		if (empty($params['caption']))
 			$params['caption'] = BBCode::convert("[quote]" . $siteinfo["description"] . "[/quote]", false, 4);
 
 		$consumer_key = Config::get('tumblr','consumer_key');
diff --git a/twitter/twitter.php b/twitter/twitter.php
index d9baf1bd..e8431241 100644
--- a/twitter/twitter.php
+++ b/twitter/twitter.php
@@ -605,11 +605,11 @@ function twitter_post_hook(App $a, &$b)
 		$result = $connection->post($url, $post);
 		logger('twitter_post send, result: ' . print_r($result, true), LOGGER_DEBUG);
 
-		if ($result->source) {
+		if (!empty($result->source)) {
 			Config::set("twitter", "application_name", strip_tags($result->source));
 		}
 
-		if ($result->errors) {
+		if (!empty($result->errors)) {
 			logger('Send to Twitter failed: "' . print_r($result->errors, true) . '"');
 
 			$r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `self`", intval($b['uid']));
@@ -725,9 +725,15 @@ function twitter_expire(App $a, $b)
 		return;
 	}
 
-	$r = dba::select('item', ['id'], ['deleted' => true, 'network' => NETWORK_TWITTER]);
+	$r = dba::select('item', ['id', 'iaid', 'icid'], ['deleted' => true, 'network' => NETWORK_TWITTER]);
 	while ($row = dba::fetch($r)) {
 		dba::delete('item', ['id' => $row['id']]);
+		if (!empty($row['iaid']) && !dba::exists('item', ['iaid' => $row['iaid']])) {
+			dba::delete('item-activity', ['id' => $row['iaid']]);
+		}
+		if (!empty($row['icid']) && !dba::exists('item', ['icid' => $row['icid']])) {
+			dba::delete('item-content', ['id' => $row['icid']]);
+		}
 	}
 	dba::close($r);
 
@@ -1772,12 +1778,12 @@ function twitter_is_retweet(App $a, $uid, $body)
 
 	$link = "";
 	preg_match("/link='(.*?)'/ism", $attributes, $matches);
-	if ($matches[1] != "") {
+	if (!empty($matches[1])) {
 		$link = $matches[1];
 	}
 
 	preg_match('/link="(.*?)"/ism', $attributes, $matches);
-	if ($matches[1] != "") {
+	if (!empty($matches[1])) {
 		$link = $matches[1];
 	}