diff --git a/phpseclib/Crypt/RSA.php b/phpseclib/Crypt/RSA.php
index 186fcc08..defb464d 100644
--- a/phpseclib/Crypt/RSA.php
+++ b/phpseclib/Crypt/RSA.php
@@ -662,7 +662,6 @@ class RSA
             $this->encryptionMode = $key->encryptionMode;
             $this->signatureMode = $key->signatureMode;
             $this->password = $key->password;
-            $this->comment = $key->comment;
 
             if (is_object($key->hash)) {
                 $this->hash = new Hash($key->hash->getHash());
@@ -728,9 +727,6 @@ class RSA
             return false;
         }
 
-        if (isset($components['comment']) && $components['comment'] !== false) {
-            $this->comment = $components['comment'];
-        }
         $this->modulus = $components['modulus'];
         $this->k = strlen($this->modulus->toBytes());
         $this->exponent = isset($components['privateExponent']) ? $components['privateExponent'] : $components['publicExponent'];
@@ -2022,28 +2018,6 @@ class RSA
         $this->signatureMode = $mode;
     }
 
-    /**
-     * Set public key comment.
-     *
-     * @access public
-     * @param string $comment
-     */
-    function setComment($comment)
-    {
-        $this->comment = $comment;
-    }
-
-    /**
-     * Get public key comment.
-     *
-     * @access public
-     * @return string
-     */
-    function getComment()
-    {
-        return $this->comment;
-    }
-
     /**
      * Encryption
      *
diff --git a/phpseclib/Crypt/RSA/PuTTY.php b/phpseclib/Crypt/RSA/PuTTY.php
index 014eaa47..a4d804bc 100644
--- a/phpseclib/Crypt/RSA/PuTTY.php
+++ b/phpseclib/Crypt/RSA/PuTTY.php
@@ -16,6 +16,7 @@ namespace phpseclib\Crypt\RSA;
 
 use phpseclib\Math\BigInteger;
 use phpseclib\Crypt\AES;
+use phpseclib\Crypt\Hash;
 
 /**
  * PuTTY Formatted RSA Key Handler
@@ -75,6 +76,11 @@ class PuTTY
      */
     static function load($key, $password = '')
     {
+        static $one;
+        if (!isset($one)) {
+            $one = new BigInteger(1);
+        }
+
         $components = array('isPublicKey' => false);
         $key = preg_split('#\r\n|\r|\n#', $key);
         $type = trim(preg_replace('#PuTTY-User-Key-File-2: (.+)#', '$1', $key[0]));
@@ -126,9 +132,9 @@ class PuTTY
         }
         $components['primes'][] = new BigInteger(self::_string_shift($private, $length), -256);
 
-        $temp = $components['primes'][1]->subtract(self::$one);
+        $temp = $components['primes'][1]->subtract($one);
         $components['exponents'] = array(1 => $components['publicExponent']->modInverse($temp));
-        $temp = $components['primes'][2]->subtract(self::$one);
+        $temp = $components['primes'][2]->subtract($one);
         $components['exponents'][] = $components['publicExponent']->modInverse($temp);
 
         extract(unpack('Nlength', self::_string_shift($private, 4)));
@@ -177,7 +183,6 @@ class PuTTY
         }
 
         $raw = array(
-            'version' => $num_primes == 2 ? chr(0) : chr(1), // two-prime vs. multi
             'modulus' => $n->toBytes(true),
             'publicExponent' => $e->toBytes(true),
             'privateExponent' => $d->toBytes(true),
diff --git a/tests/Unit/Crypt/RSA/LoadKeyTest.php b/tests/Unit/Crypt/RSA/LoadKeyTest.php
index e6739e05..ee28863d 100644
--- a/tests/Unit/Crypt/RSA/LoadKeyTest.php
+++ b/tests/Unit/Crypt/RSA/LoadKeyTest.php
@@ -6,6 +6,7 @@
  */
 
 use phpseclib\Crypt\RSA;
+use phpseclib\Crypt\RSA\PKCS1;
 
 class Unit_Crypt_RSA_LoadKeyTest extends PhpseclibTestCase
 {
@@ -339,16 +340,17 @@ rmfPwIGm63ilAAAAQQDEIvkdBvZtCvgHKitwxab+EQ/YxnNE5XvfIXjWE+xEL2br
 oquF470c9Mm6jf/2zmn6yobE6UUvQ0O3hKSiyOAbAAAAQBGoiuSoSjafUhV7i1cE
 Gpb88h5NBYZzWXGZ37sJ5QsW+sJyoNde3xH8vdXhzU7eT82D6X/scw9RZz+/6rCJ
 4p0=
-Private-MAC: 03e2cb74e1d67652fbad063d2ed0478f31bdf256';
+Private-MAC: 03e2cb74e1d67652fbad063d2ed0478f31bdf256
+';
+        $key = preg_replace('#(?<!\r)\n#', "\r\n", $key);
         $this->assertTrue($rsa->load($key));
 
         PKCS1::setEncryptionAlgorithm('AES-256-CBC');
         $rsa->setPassword('demo');
 
-        $encryptedKey = (string) $key;
+        $encryptedKey = (string) $rsa;
 
-        // change back to the original format to demonstrate that this doesn't break anything
-        PKCS1::setEncryptionAlgorithm('DES-EDE3-CBC');
+        $this->assertRegExp('#AES-256-CBC#', $encryptedKey);
 
         $rsa = new RSA();
         $rsa->setPassword('demo');