diff --git a/lib/Horde/Imap/Client/Exception.php b/lib/Horde/Imap/Client/Exception.php
index 626e86f3..deecf574 100644
--- a/lib/Horde/Imap/Client/Exception.php
+++ b/lib/Horde/Imap/Client/Exception.php
@@ -261,7 +261,7 @@ class Horde_Imap_Client_Exception extends Horde_Exception_Wrapped
      * @param string $message  Error message (non-translated).
      * @param int $code        Error code.
      */
-    public function __construct($message = null, $code = null)
+    public function __construct($message = '', $code = 0)
     {
         parent::__construct($message, $code);
 
diff --git a/lib/Horde/Imap/Client/Ids.php b/lib/Horde/Imap/Client/Ids.php
index e6608fb4..a5dca82f 100644
--- a/lib/Horde/Imap/Client/Ids.php
+++ b/lib/Horde/Imap/Client/Ids.php
@@ -169,7 +169,7 @@ public function add($ids)
             } elseif ($add = $this->_resolveIds($ids)) {
                 if (is_array($this->_ids) && !empty($this->_ids)) {
                     foreach ($add as $val) {
-                        $this->_ids[] = $val;
+                        $this->_ids[] = (int) $val;
                     }
                 } else {
                     $this->_ids = $add;
@@ -364,10 +364,10 @@ protected function _fromSequenceString($str)
             $range = explode(':', $val);
             if (isset($range[1])) {
                 for ($i = min($range), $j = max($range); $i <= $j; ++$i) {
-                    $ids[] = $i;
+                    $ids[] = (int) $i;
                 }
             } else {
-                $ids[] = $val;
+                $ids[] = (int) $val;
             }
         }
 
diff --git a/lib/Horde/Imap/Client/Socket.php b/lib/Horde/Imap/Client/Socket.php
index f2021689..45873114 100644
--- a/lib/Horde/Imap/Client/Socket.php
+++ b/lib/Horde/Imap/Client/Socket.php
@@ -3568,21 +3568,29 @@ protected function _parseEnvelope(Horde_Imap_Client_Tokenize $data)
         return $ret;
     }
 
-    /**
-     */
     protected function _vanished($modseq, Horde_Imap_Client_Ids $ids)
     {
-        $pipeline = $this->_pipeline(
-            $this->_command('UID FETCH')->add([
-                strval($ids),
+        // Unlike _fetchCmd(), sequence IDs are rejected before reaching
+        // here, so we always issue UID FETCH. Chunk UIDs to avoid
+        // exceeding the server's command length limit.
+
+        $modifiers = new Horde_Imap_Client_Data_Format_List([
+            'VANISHED',
+            'CHANGEDSINCE',
+            new Horde_Imap_Client_Data_Format_Number($modseq),
+        ]);
+
+        $pipeline = $this->_pipeline();
+
+        foreach ($ids->split($this->_capability()->cmdlength) as $val) {
+            $cmd = $this->_command('UID FETCH')->add([
+                $val,
                 'UID',
-                new Horde_Imap_Client_Data_Format_List([
-                    'VANISHED',
-                    'CHANGEDSINCE',
-                    new Horde_Imap_Client_Data_Format_Number($modseq),
-                ]),
-            ])
-        );
+                $modifiers,
+            ]);
+            $pipeline->add($cmd);
+        }
+
         $pipeline->data['vanished'] = $this->getIdsOb();
 
         return $this->_sendCmd($pipeline)->data['vanished'];
@@ -4339,13 +4347,15 @@ protected function _sendCmdChunk($pipeline, $chunk)
                         $this->_temp['logout'] = true;
                         $this->logout();
                         throw $e;
-                }
 
-                /* For all other issues, catch and store exception; don't
-                 * throw until all input is read since we need to clear
-                 * incoming queue. (For now, only store first exception.) */
-                if (is_null($exception)) {
-                    $exception = $e;
+                    default:
+                        /* For all other issues, catch and store exception;
+                         * don't throw until all input is read since we need
+                         * to clear incoming queue. (For now, only store first
+                         * exception.) */
+                        if (is_null($exception)) {
+                            $exception = $e;
+                        }
                 }
 
                 if (($e instanceof Horde_Imap_Client_Exception_ServerResponse)
diff --git a/lib/Horde/Imap/Client/Socket/Connection/Socket.php b/lib/Horde/Imap/Client/Socket/Connection/Socket.php
index 7eccfcee..4e17c4e9 100644
--- a/lib/Horde/Imap/Client/Socket/Connection/Socket.php
+++ b/lib/Horde/Imap/Client/Socket/Connection/Socket.php
@@ -197,7 +197,7 @@ public function read($size = null)
                         $read_now = microtime(true);
                         $t_read = $read_now - $read_start;
                         if ($t_read > $this->_params['timeout']) {
-                            $this->_params['debug']->info(sprintf('ERROR: read timeout. No data received for %d seconds.', $this->_params['read_timeout']));
+                            $this->_params['debug']->info(sprintf('ERROR: read timeout. No data received for %d seconds.', $this->_params['timeout']));
 
                             throw new Horde_Imap_Client_Exception(
                                 Horde_Imap_Client_Translation::r("Read timeout."),
diff --git a/lib/Horde/Imap/Client/Socket/Pop3.php b/lib/Horde/Imap/Client/Socket/Pop3.php
index 43647ef8..35ef7bb4 100644
--- a/lib/Horde/Imap/Client/Socket/Pop3.php
+++ b/lib/Horde/Imap/Client/Socket/Pop3.php
@@ -1029,7 +1029,7 @@ protected function _fetchCmd(
                 case Horde_Imap_Client::FETCH_IMAPDATE:
                     foreach ($seq_ids as $id) {
                         $tmp = $this->_pop3Cache('hdrob', $id);
-                        $results->get($lookup[$id])->setImapDate($tmp['Date']);
+                        $results->get($lookup[$id])->setImapDate((string) $tmp['Date']);
                     }
                     break;
 
diff --git a/lib/Horde/Imap/Client/Tokenize.php b/lib/Horde/Imap/Client/Tokenize.php
index f298c3ff..c2ee7081 100644
--- a/lib/Horde/Imap/Client/Tokenize.php
+++ b/lib/Horde/Imap/Client/Tokenize.php
@@ -94,10 +94,19 @@ public function __construct($data = null)
         }
     }
 
+    public function __destruct()
+    {
+        if (isset($this->_stream)) {
+            $this->_stream->close();
+            $this->_stream = null;
+        }
+    }
+
     /**
      */
     public function __clone()
     {
+        $this->_stream = null;
         throw new LogicException('Object can not be cloned.');
     }
 
diff --git a/test/Stub/Socket.php b/test/Stub/Socket.php
index 7df3ab88..704dc0e0 100644
--- a/test/Stub/Socket.php
+++ b/test/Stub/Socket.php
@@ -13,7 +13,10 @@
 
 namespace Horde\Imap\Client\Test\Stub;
 
+use Horde_Imap_Client_Data_Capability_Imap;
 use Horde_Imap_Client_Data_Thread;
+use Horde_Imap_Client_Ids;
+use Horde_Imap_Client_Interaction_Pipeline;
 use Horde_Imap_Client_Interaction_Server;
 use Horde_Imap_Client_Socket;
 use Horde_Imap_Client_Tokenize;
@@ -30,6 +33,19 @@ class Socket extends Horde_Imap_Client_Socket
 {
     public $fetch_results;
 
+    private bool $captureSendCmd = false;
+
+    public ?Horde_Imap_Client_Interaction_Pipeline $capturedPipeline = null;
+
+    protected function _sendCmd($cmd)
+    {
+        if ($this->captureSendCmd) {
+            $this->capturedPipeline = $cmd;
+            return $cmd;
+        }
+        return parent::_sendCmd($cmd);
+    }
+
     public function getThreadSort($data)
     {
         return new Horde_Imap_Client_Data_Thread($this->doServerResponse($this->_pipeline(), $data)->data['threadparse'], 'uid');
@@ -96,4 +112,13 @@ public function fetch($mailbox, $query, array $options = [])
     {
         return $this->fetch_results;
     }
+
+    public function doVanishedPipeline(int $modseq, Horde_Imap_Client_Ids $ids): Horde_Imap_Client_Interaction_Pipeline
+    {
+        $this->captureSendCmd = true;
+        $this->capturedPipeline = null;
+        $this->_init['capability'] = new Horde_Imap_Client_Data_Capability_Imap();
+        $this->_vanished($modseq, $ids);
+        return $this->capturedPipeline;
+    }
 }
diff --git a/test/Unit/IdsTest.php b/test/Unit/IdsTest.php
index 4d742328..5b64aa57 100644
--- a/test/Unit/IdsTest.php
+++ b/test/Unit/IdsTest.php
@@ -352,4 +352,45 @@ public function testSerialize()
         );
     }
 
+    public function testForcedIntForRange()
+    {
+        $ids = new Horde_Imap_Client_Ids('1:3');
+        $this->assertEquals(
+            [1, 2, 3],
+            iterator_to_array($ids)
+        );
+
+        foreach (iterator_to_array($ids) as $id) {
+            $this->assertIsInt($id);
+        }
+    }
+
+    public function testForcedIntForSequence()
+    {
+        $ids = new Horde_Imap_Client_Ids('1,5,7');
+        $this->assertEquals(
+            [1, 5, 7],
+            iterator_to_array($ids)
+        );
+
+        foreach (iterator_to_array($ids) as $id) {
+            $this->assertIsInt($id);
+        }
+    }
+
+    public function testAddingWithForcedIntConversion()
+    {
+        $ids = new Horde_Imap_Client_Ids('1,5,7');
+        $ids->add('101:103');
+
+        $this->assertEquals(
+            [1, 5, 7, 101, 102, 103],
+            iterator_to_array($ids)
+        );
+
+        foreach (iterator_to_array($ids) as $id) {
+            $this->assertIsInt($id);
+        }
+    }
+
 }
diff --git a/test/Unit/SocketTest.php b/test/Unit/SocketTest.php
index 8125a8ab..b43c71a9 100644
--- a/test/Unit/SocketTest.php
+++ b/test/Unit/SocketTest.php
@@ -17,7 +17,9 @@
 use PHPUnit\Framework\Attributes\CoversNothing;
 use PHPUnit\Framework\TestCase;
 use Horde\Imap\Client\Test\Stub\Socket;
+use Horde_Imap_Client_Data_Thread;
 use Horde_Imap_Client_Fetch_Results;
+use Horde_Imap_Client_Ids;
 
 /**
  * Tests for the IMAP Socket driver.
@@ -49,10 +51,10 @@ public function testSimpleThreadParse()
         $data = '* THREAD (1)';
         $thread = $this->test_ob->getThreadSort($data);
 
-        $this->assertFalse($thread instanceof Horde_Imap_Client_Data_Thread);
+        $this->assertInstanceOf(Horde_Imap_Client_Data_Thread::class, $thread);
 
         $list = $thread->messageList();
-        $this->assertFalse($list instanceof Horde_Imap_Client_Ids);
+        $this->assertInstanceOf(Horde_Imap_Client_Ids::class, $list);
         $this->assertEquals(
             [1],
             $list->ids
@@ -92,7 +94,7 @@ public function testComplexThreadParse()
         $thread = $this->test_ob->getThreadSort($data);
 
         $list = $thread->messageList();
-        $this->assertFalse($list instanceof Horde_Imap_Client_Ids);
+        $this->assertInstanceOf(Horde_Imap_Client_Ids::class, $list);
         $this->assertEquals(
             range(1, 17),
             $list->ids
@@ -354,4 +356,22 @@ public function testParseEnvelopeBlankSubject()
         $this->assertNotNull($env->to);
     }
 
+    public function testVanishedCommand()
+    {
+        // 200 non-consecutive 4-digit UIDs, fits in one 2000-octet command.
+        $ids = new Horde_Imap_Client_Ids(range(1001, 1399, 2));
+        $pipeline = $this->test_ob->doVanishedPipeline(12345, $ids);
+
+        $this->assertCount(1, $pipeline);
+    }
+
+    public function testVanishedCommandChunks()
+    {
+        // 500 non-consecutive 4-digit UIDs, exceeds the 2000-octet limit.
+        $ids = new Horde_Imap_Client_Ids(range(1001, 1999, 2));
+        $pipeline = $this->test_ob->doVanishedPipeline(12345, $ids);
+
+        $this->assertGreaterThan(1, count($pipeline));
+    }
+
 }