diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 32b261cd96..e0a763dfe8 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -25,6 +25,7 @@ use Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\DumperInterface as
 use Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\NullDumper;
 use Symfony\Component\DependencyInjection\ExpressionLanguage;
 use Symfony\Component\ExpressionLanguage\Expression;
+use Symfony\Component\HttpKernel\Kernel;
 
 /**
  * PhpDumper dumps a service container as a PHP class.
@@ -56,6 +57,7 @@ class PhpDumper extends Dumper
     private $expressionLanguage;
     private $targetDirRegex;
     private $targetDirMaxMatches;
+    private $docStar;
 
     /**
      * @var \Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\DumperInterface
@@ -102,7 +104,9 @@ class PhpDumper extends Dumper
             'class' => 'ProjectServiceContainer',
             'base_class' => 'Container',
             'namespace' => '',
+            'debug' => true,
         ), $options);
+        $this->docStar = $options['debug'] ? '*' : '';
 
         if (!empty($options['file']) && is_dir($dir = dirname($options['file']))) {
             // Build a regexp where the first root dirs are mandatory,
@@ -227,9 +231,15 @@ class PhpDumper extends Dumper
             array($this->getProxyDumper(), 'isProxyCandidate')
         );
         $code = '';
+        $strip = '' === $this->docStar && method_exists('Symfony\Component\HttpKernel\Kernel', 'stripComments');
 
         foreach ($definitions as $definition) {
-            $code .= "\n".$this->getProxyDumper()->getProxyCode($definition);
+            $proxyCode = "\n".$this->getProxyDumper()->getProxyCode($definition);
+            if ($strip) {
+                $proxyCode = "<?php\n".$proxyCode;
+                $proxyCode = substr(Kernel::stripComments($proxyCode), 5);
+            }
+            $code .= $proxyCode;
         }
 
         return $code;
@@ -617,7 +627,7 @@ EOF;
         $visibility = $isProxyCandidate ? 'public' : 'protected';
         $code = <<<EOF
 
-    /**
+    /*{$this->docStar}
      * Gets the '$id' service.$doc
      *$lazyInitializationDoc
      * $return
@@ -740,7 +750,7 @@ use Symfony\Component\DependencyInjection\Exception\LogicException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 $bagClass
 
-/**
+/*{$this->docStar}
  * $class.
  *
  * This class has been auto-generated
@@ -766,7 +776,7 @@ EOF;
 
         $code = <<<EOF
 
-    /**
+    /*{$this->docStar}
      * Constructor.
      */
     public function __construct()
@@ -797,7 +807,7 @@ EOF;
 
         $code = <<<EOF
 
-    /**
+    /*{$this->docStar}
      * Constructor.
      */
     public function __construct()
@@ -829,7 +839,7 @@ EOF;
     {
         return <<<EOF
 
-    /**
+    /*{$this->docStar}
      * {@inheritdoc}
      */
     public function compile()
@@ -950,11 +960,14 @@ EOF;
     }
 
 EOF;
+            if ('' === $this->docStar) {
+                $code = str_replace('/**', '/*', $code);
+            }
         }
 
         $code .= <<<EOF
 
-    /**
+    /*{$this->docStar}
      * Gets the default parameters.
      *
      * @return array An array of the default parameters
diff --git a/src/Symfony/Component/Finder/Iterator/FilterIterator.php b/src/Symfony/Component/Finder/Iterator/FilterIterator.php
index 24adeb68f9..3c3c3fbec0 100644
--- a/src/Symfony/Component/Finder/Iterator/FilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/FilterIterator.php
@@ -39,11 +39,18 @@ abstract class FilterIterator extends \FilterIterator
         while ($iterator instanceof \OuterIterator) {
             $innerIterator = $iterator->getInnerIterator();
 
-            if ($innerIterator instanceof \FilesystemIterator) {
+            if ($innerIterator instanceof RecursiveDirectoryIterator) {
+                // this condition is necessary for iterators to work properly with non-local filesystems like ftp
+                if ($innerIterator->isRewindable()) {
+                    $innerIterator->next();
+                    $innerIterator->rewind();
+                }
+            } elseif ($innerIterator instanceof \FilesystemIterator) {
                 $innerIterator->next();
                 $innerIterator->rewind();
             }
-            $iterator = $iterator->getInnerIterator();
+
+            $iterator = $innerIterator;
         }
 
         parent::rewind();
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
index 6d08fdfc68..ff09a04eab 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
@@ -236,6 +236,10 @@ class NativeSessionStorage implements SessionStorageInterface
      */
     public function registerBag(SessionBagInterface $bag)
     {
+        if ($this->started) {
+            throw new \LogicException('Cannot register a bag when the session is already started.');
+        }
+
         $this->bags[$bag->getName()] = $bag;
     }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
index 778a3f606a..ee3dfee797 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
@@ -82,6 +82,16 @@ class NativeSessionStorageTest extends \PHPUnit_Framework_TestCase
         $storage->getBag('non_existing');
     }
 
+    /**
+     * @expectedException \LogicException
+     */
+    public function testRegisterBagForAStartedSessionThrowsException()
+    {
+        $storage = $this->getStorage();
+        $storage->start();
+        $storage->registerBag(new AttributeBag());
+    }
+
     public function testGetId()
     {
         $storage = $this->getStorage();
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index 459f146a4c..ab59d13200 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -629,10 +629,7 @@ abstract class Kernel implements KernelInterface, TerminableInterface
             $dumper->setProxyDumper(new ProxyDumper(md5($cache->getPath())));
         }
 
-        $content = $dumper->dump(array('class' => $class, 'base_class' => $baseClass, 'file' => $cache->getPath()));
-        if (!$this->debug) {
-            $content = static::stripComments($content);
-        }
+        $content = $dumper->dump(array('class' => $class, 'base_class' => $baseClass, 'file' => $cache->getPath(), 'debug' => $this->debug));
 
         $cache->write($content, $container->getResources());
     }