diff --git a/src/app/qtsingleapplication/qtlocalpeer.cpp b/src/app/qtsingleapplication/qtlocalpeer.cpp
index f3c4546b6..d8a1bce31 100644
--- a/src/app/qtsingleapplication/qtlocalpeer.cpp
+++ b/src/app/qtsingleapplication/qtlocalpeer.cpp
@@ -101,6 +101,7 @@ QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
 #endif
 
     server = new QLocalServer(this);
+    server->setSocketOptions(QLocalServer::UserAccessOption);
     QString lockName = QDir(QDir::tempPath()).absolutePath()
                        + QLatin1Char('/') + socketName
                        + QLatin1String("-lockfile");
@@ -191,6 +192,12 @@ void QtLocalPeer::receiveConnection()
     QByteArray uMsg;
     quint32 remaining;
     ds >> remaining;
+    if (remaining > 65535) {
+        // drop suspiciously large data
+        delete socket;
+        return;
+    }
+
     uMsg.resize(remaining);
     int got = 0;
     char* uMsgBuf = uMsg.data();
diff --git a/src/base/bittorrent/session.cpp b/src/base/bittorrent/session.cpp
index 71694358d..0b6162f0b 100644
--- a/src/base/bittorrent/session.cpp
+++ b/src/base/bittorrent/session.cpp
@@ -4316,9 +4316,14 @@ void Session::handleTorrentDeleteFailedAlert(libt::torrent_delete_failed_alert *
     // so we remove the directory ourselves
     Utils::Fs::smartRemoveEmptyFolderTree(tmpRemovingTorrentData.savePathToRemove);
 
-    LogMsg(tr("'%1' was removed from the transfer list but the files couldn't be deleted. Error: %2", "'xxx.avi' was removed...")
-           .arg(tmpRemovingTorrentData.name, QString::fromLocal8Bit(p->error.message().c_str()))
-           , Log::CRITICAL);
+    if (p->error) {
+        LogMsg(tr("'%1' was removed from the transfer list but the files couldn't be deleted. Error: %2", "'xxx.avi' was removed...")
+                .arg(tmpRemovingTorrentData.name, QString::fromStdString(p->error.message()))
+            , Log::WARNING);
+    }
+    else {
+        LogMsg(tr("'%1' was removed from the transfer list.", "'xxx.avi' was removed...").arg(tmpRemovingTorrentData.name));
+    }
 }
 
 void Session::handleMetadataReceivedAlert(libt::metadata_received_alert *p)
diff --git a/src/base/bittorrent/torrenthandle.cpp b/src/base/bittorrent/torrenthandle.cpp
index 13842b61d..5d4667649 100644
--- a/src/base/bittorrent/torrenthandle.cpp
+++ b/src/base/bittorrent/torrenthandle.cpp
@@ -1285,6 +1285,8 @@ void TorrentHandle::setSequentialDownload(bool b)
         m_nativeHandle.set_sequential_download(b);
         m_nativeStatus.sequential_download = b; // prevent return cached value
     }
+
+    saveResumeData();
 }
 
 void TorrentHandle::toggleSequentialDownload()
@@ -1331,6 +1333,8 @@ void TorrentHandle::setFirstLastPiecePriorityImpl(const bool enabled, const QVec
 
     LogMsg(tr("Download first and last piece first: %1, torrent: '%2'")
         .arg((enabled ? tr("On") : tr("Off")), name()));
+
+    saveResumeData();
 }
 
 void TorrentHandle::toggleFirstLastPiecePriority()