diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index 656506d84d..80a5d93cb2 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -1113,7 +1113,7 @@ class Contact
 			$contact = self::selectFirst(['id'], ['nurl' => $urls, 'uid' => $uid]);
 			if (!empty($contact['id'])) {
 				$contact_id = $contact['id'];
-				Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'probed_url' => $data['url'], 'alias' => $data['alias'], 'addr' => $data['addr']]);
+				Logger::info('Fetched id by url', ['cid' => $contact_id, 'uid' => $uid, 'url' => $url, 'data' => $data]);
 			}
 		}
 
diff --git a/src/Model/Item.php b/src/Model/Item.php
index 0fcb445e0b..9890c8a995 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3980,12 +3980,12 @@ class Item
 
 		// The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
 		if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
-			Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
+			Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
 			return false;
 		}
 
 		if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
-			Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
+			Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
 			return false;
 		}
 
diff --git a/src/Protocol/ActivityPub/Transmitter.php b/src/Protocol/ActivityPub/Transmitter.php
index 43a4384d4d..531a23a69b 100644
--- a/src/Protocol/ActivityPub/Transmitter.php
+++ b/src/Protocol/ActivityPub/Transmitter.php
@@ -719,7 +719,7 @@ class Transmitter
 				continue;
 			}
 
-			if ($isforum && ($contact['dfrn'] == Protocol::DFRN)) {
+			if ($isforum && ($contact['network'] == Protocol::DFRN)) {
 				continue;
 			}
 
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 9e9f1a574b..7ab41eb52b 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -1565,7 +1565,6 @@ class Diaspora
 		$datarray["gravity"] = GRAVITY_COMMENT;
 
 		$datarray['thr-parent'] = $thr_parent ?: $toplevel_parent_item['uri'];
-		$datarray['parent-uri'] = $toplevel_parent_item['uri'];
 
 		$datarray["object-type"] = Activity\ObjectType::COMMENT;
 
@@ -1963,7 +1962,6 @@ class Diaspora
 		$datarray["verb"] = Activity::FOLLOW;
 		$datarray["gravity"] = GRAVITY_ACTIVITY;
 		$datarray['thr-parent'] = $toplevel_parent_item['uri'];
-		$datarray['parent-uri'] = $toplevel_parent_item['parent-uri'];
 
 		$datarray["object-type"] = Activity\ObjectType::NOTE;
 
@@ -2356,7 +2354,6 @@ class Diaspora
 		$datarray['guid'] = $parent['guid'] . '-' . $guid;
 		$datarray['uri'] = self::getUriFromGuid($author, $datarray['guid']);
 		$datarray['thr-parent'] = $parent['uri'];
-		$datarray['parent-uri'] = $parent['parent-uri'];
 
 		$datarray['verb'] = $datarray['body'] = Activity::ANNOUNCE;
 		$datarray['gravity'] = GRAVITY_ACTIVITY;
diff --git a/src/Protocol/OStatus.php b/src/Protocol/OStatus.php
index 9d9e10f7a3..b8724acc7f 100644
--- a/src/Protocol/OStatus.php
+++ b/src/Protocol/OStatus.php
@@ -521,12 +521,6 @@ class OStatus
 							Logger::log("Item with uri ".self::$itemlist[0]['uri']." will be imported since the thread contains posts or shares.", Logger::DEBUG);
 						}
 					}
-				} else {
-					// But we will only import complete threads
-					$valid = Item::exists(['uid' => $importer["uid"], 'uri' => self::$itemlist[0]['parent-uri']]);
-					if ($valid) {
-						Logger::log("Item with uri ".self::$itemlist[0]["uri"]." belongs to parent ".self::$itemlist[0]['thr-parent']." of user ".$importer["uid"].". It will be imported.", Logger::DEBUG);
-					}
 				}
 
 				if ($valid) {
diff --git a/view/theme/vier/style.php b/view/theme/vier/style.php
index ac5cd08efb..8cd0d7a32a 100644
--- a/view/theme/vier/style.php
+++ b/view/theme/vier/style.php
@@ -61,7 +61,7 @@ header('Cache-Control: public');
 header('ETag: "'.$etag.'"');
 header('Last-Modified: '.$modified);
 
-if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) || isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
+if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
 	$cached_modified = gmdate('r', strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']));
 	$cached_etag = str_replace(['"', "-gzip"], ['', ''],
 				stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));