diff --git a/src/AbstractProtocol.php b/src/AbstractProtocol.php
index d140869e..1772df32 100644
--- a/src/AbstractProtocol.php
+++ b/src/AbstractProtocol.php
@@ -135,7 +135,7 @@ public function __construct($host = '127.0.0.1', $port = null)
         $this->_validHost->addValidator(new HostnameValidator(HostnameValidator::ALLOW_ALL));
 
         if (!$this->_validHost->isValid($host)) {
-            throw new Protocol\Exception\RuntimeException(join(', ', $this->_validHost->getMessages()));
+            throw new Protocol\Exception\RuntimeException(implode(', ', $this->_validHost->getMessages()));
         }
 
         $this->_host = $host;
diff --git a/src/Exception.php b/src/Exception.php
index 572a5736..cbd2f8e2 100644
--- a/src/Exception.php
+++ b/src/Exception.php
@@ -24,7 +24,6 @@
 namespace Zend\Mail;
 
 /**
- * @uses       \Zend\Exception
  * @category   Zend
  * @package    Zend_Mail
  * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
diff --git a/src/Part/Exception.php b/src/Part/Exception.php
index 4388831b..c14e6746 100644
--- a/src/Part/Exception.php
+++ b/src/Part/Exception.php
@@ -26,7 +26,7 @@
 use Zend\Mail;
 
 /**
- * @uses       \Zend\Exception
+ * @uses       \Zend\Mail\Exception
  * @category   Zend
  * @package    Zend_Mail
  * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
diff --git a/src/Protocol/Exception.php b/src/Protocol/Exception.php
index bf7d1e60..c1d2e282 100644
--- a/src/Protocol/Exception.php
+++ b/src/Protocol/Exception.php
@@ -25,7 +25,7 @@
 use Zend\Mail;
 
 /**
- * @uses       \Zend\Exception
+ * @uses       \Zend\Mail\Exception
  * @category   Zend
  * @package    Zend_Mail
  * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
diff --git a/src/Protocol/Imap.php b/src/Protocol/Imap.php
index f3221643..b89c0d5b 100644
--- a/src/Protocol/Imap.php
+++ b/src/Protocol/Imap.php
@@ -330,7 +330,7 @@ public function sendRequest($command, $tokens = array(), &$tag = null)
 
         foreach ($tokens as $token) {
             if (is_array($token)) {
-                if (@fputs($this->_socket, $line . ' ' . $token[0] . "\r\n") === false) {
+                if (@fwrite($this->_socket, $line . ' ' . $token[0] . "\r\n") === false) {
                     throw new Exception\RuntimeException('cannot write - connection closed?');
                 }
                 if (!$this->_assumedNextLine('+ ')) {
@@ -342,7 +342,7 @@ public function sendRequest($command, $tokens = array(), &$tag = null)
             }
         }
 
-        if (@fputs($this->_socket, $line . "\r\n") === false) {
+        if (@fwrite($this->_socket, $line . "\r\n") === false) {
             throw new Exception\RuntimeException('cannot write - connection closed?');
         }
     }
diff --git a/src/Protocol/Smtp.php b/src/Protocol/Smtp.php
index f25b874a..01ef19b8 100644
--- a/src/Protocol/Smtp.php
+++ b/src/Protocol/Smtp.php
@@ -177,7 +177,7 @@ public function helo($host = '127.0.0.1')
 
         // Validate client hostname
         if (!$this->_validHost->isValid($host)) {
-            throw new Exception\RuntimeException(join(', ', $this->_validHost->getMessages()));
+            throw new Exception\RuntimeException(implode(', ', $this->_validHost->getMessages()));
         }
 
         // Initiate helo sequence
diff --git a/src/Storage/Exception.php b/src/Storage/Exception.php
index c8290391..66758e6b 100644
--- a/src/Storage/Exception.php
+++ b/src/Storage/Exception.php
@@ -25,7 +25,7 @@
 use Zend\Mail;
 
 /**
- * @uses       \Zend\Exception
+ * @uses       \Zend\Mail\Exception
  * @category   Zend
  * @package    Zend_Mail
  * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
diff --git a/src/Storage/Writable/Maildir.php b/src/Storage/Writable/Maildir.php
index 1c3b9ee6..41ce47c7 100644
--- a/src/Storage/Writable/Maildir.php
+++ b/src/Storage/Writable/Maildir.php
@@ -347,8 +347,8 @@ public function renameFolder($oldName, $newName)
     protected function _createUniqueId()
     {
         $id = '';
-        $id .= function_exists('microtime') ? microtime(true) : (time() . ' ' . rand(0, 100000));
-        $id .= '.' . (function_exists('posix_getpid') ? posix_getpid() : rand(50, 65535));
+        $id .= microtime(true);
+        $id .= '.' . getmypid();
         $id .= '.' . php_uname('n');
 
         return $id;
@@ -477,7 +477,7 @@ public function appendMessage($message, $folder = null, $flags = null, $recent =
         if (is_resource($message) && get_resource_type($message) == 'stream') {
             stream_copy_to_stream($message, $temp_file['handle']);
         } else {
-            fputs($temp_file['handle'], $message);
+            fwrite($temp_file['handle'], $message);
         }
         fclose($temp_file['handle']);
 
@@ -819,8 +819,8 @@ protected function _calculateMaildirsize()
             $definition[] = $value . $type;
         }
         $definition = implode(',', $definition);
-        fputs($fh, "$definition\n");
-        fputs($fh, "$total_size $messages\n");
+        fwrite($fh, "$definition\n");
+        fwrite($fh, "$total_size $messages\n");
         fclose($fh);
         rename($tmp['filename'], $this->_rootdir . 'maildirsize');
         foreach ($timestamps as $dir => $timestamp) {
diff --git a/src/Transport/Exception.php b/src/Transport/Exception.php
index 07ffe136..c2eaed80 100644
--- a/src/Transport/Exception.php
+++ b/src/Transport/Exception.php
@@ -25,7 +25,7 @@
 use Zend\Mail;
 
 /**
- * @uses       \Zend\Exception
+ * @uses       \Zend\Mail\Exception
  * @category   Zend
  * @package    Zend_Mail
  * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
diff --git a/test/MessageTest.php b/test/MessageTest.php
index 948e5af4..3dcef329 100644
--- a/test/MessageTest.php
+++ b/test/MessageTest.php
@@ -162,7 +162,7 @@ public function testSplitInvalidMessage()
     {
         try {
             Mime\Decode::splitMessageStruct("--xxx\n", 'xxx');
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             return; // ok
         }
 
@@ -173,7 +173,7 @@ public function testInvalidMailHandler()
     {
         try {
             $message = new Message(array('handler' => 1));
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             return; // ok
         }
 
@@ -187,7 +187,7 @@ public function testMissingId()
 
         try {
             $message = new Message(array('handler' => $mail));
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             return; // ok
         }
 
@@ -230,7 +230,7 @@ public function testSplitInvalidHeader()
         $header = '';
         try {
             Mime\Decode::splitHeaderField($header);
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             return; // ok
         }
 
@@ -268,7 +268,7 @@ public function testNoContent()
 
         try {
             $message->getContent();
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             return; // ok
         }
 
@@ -284,7 +284,7 @@ public function testEmptyHeader()
         $subject = null;
         try {
             $subject = $message->subject;
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             // ok
         }
         if ($subject) {
@@ -298,7 +298,7 @@ public function testEmptyBody()
         $part = null;
         try {
             $part = $message->getPart(1);
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             // ok
         }
         if ($part) {
@@ -329,7 +329,7 @@ public function testWrongMultipart()
 
         try {
             $message->getPart(1);
-        } catch (\Zend\Exception $e) {
+        } catch (\Zend\Mime\Exception $e) {
             return; // ok
         }
         $this->fail('no exception raised while getting part from message without boundary');