diff --git a/src/Symfony/Component/Config/Loader/FileLoader.php b/src/Symfony/Component/Config/Loader/FileLoader.php
index c4e3cedf28..3c2556a88e 100644
--- a/src/Symfony/Component/Config/Loader/FileLoader.php
+++ b/src/Symfony/Component/Config/Loader/FileLoader.php
@@ -72,7 +72,7 @@ abstract class FileLoader extends Loader
             }
             self::$loading[$resource] = true;
 
-            $ret = $loader->load($resource);
+            $ret = $loader->load($resource, $type);
 
             unset(self::$loading[$resource]);
 
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 4d34e55402..4a29d23448 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -694,7 +694,13 @@ EOF;
      */
     public function __construct()
     {
-        \$this->parameters = \$this->getDefaultParameters();
+EOF;
+
+        if ($this->container->getParameterBag()->all()) {
+            $code .= "\n        \$this->parameters = \$this->getDefaultParameters();\n";
+        }
+
+        $code .= <<<EOF
 
         \$this->services =
         \$this->scopedServices =
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index c1e2070a98..859ca50013 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -44,6 +44,20 @@ class PhpDumperTest extends \PHPUnit_Framework_TestCase
         new PhpDumper($container);
     }
 
+    public function testDumpFrozenContainerWithNoParameter()
+    {
+        $container = new ContainerBuilder();
+        $container->register('foo', 'stdClass');
+
+        $container->compile();
+
+        $dumper = new PhpDumper($container);
+
+        $dumpedString = $dumper->dump();
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services11.php', $dumpedString, '->dump() does not add getDefaultParameters() method call if container have no parameters.');
+        $this->assertNotRegexp("/function getDefaultParameters\(/", $dumpedString, '->dump() does not add getDefaultParameters() method definition.');
+    }
+
     public function testDumpOptimizationString()
     {
         $definition = new Definition();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services11.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services11.php
new file mode 100644
index 0000000000..6cf65ee5b0
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services11.php
@@ -0,0 +1,48 @@
+<?php
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\InactiveScopeException;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\Parameter;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+
+/**
+ * ProjectServiceContainer
+ *
+ * This class has been auto-generated
+ * by the Symfony Dependency Injection Component.
+ */
+class ProjectServiceContainer extends Container
+{
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        $this->services =
+        $this->scopedServices =
+        $this->scopeStacks = array();
+
+        $this->set('service_container', $this);
+
+        $this->scopes = array();
+        $this->scopeChildren = array();
+    }
+
+    /**
+     * Gets the 'foo' service.
+     *
+     * This service is shared.
+     * This method always returns the same instance of the service.
+     *
+     * @return stdClass A stdClass instance.
+     */
+    protected function getFooService()
+    {
+        return $this->services['foo'] = new \stdClass();
+    }
+}
diff --git a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
index bb1e3089ea..53b2073672 100644
--- a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
@@ -75,19 +75,26 @@ class ContextListener implements ListenerInterface
 
         if (null === $session || null === $token = $session->get('_security_'.$this->contextKey)) {
             $this->context->setToken(null);
-        } else {
-            if (null !== $this->logger) {
-                $this->logger->debug('Read SecurityContext from the session');
-            }
-
-            $token = unserialize($token);
-
-            if (null !== $token) {
-                $token = $this->refreshUser($token);
-            }
-
-            $this->context->setToken($token);
+            return;
         }
+
+        $token = unserialize($token);
+
+        if (null !== $this->logger) {
+            $this->logger->debug('Read SecurityContext from the session');
+        }
+
+        if ($token instanceof TokenInterface) {
+            $token = $this->refreshUser($token);
+        } elseif (null !== $token) {
+            if (null !== $this->logger) {
+                $this->logger->warn(sprintf('Session includes a "%s" where a security token is expected', is_object($value) ? get_class($value) : gettype($value)));
+            }
+
+            $token = null;
+        }
+
+        $this->context->setToken($token);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Tests/Http/Firewall/ContextListenerTest.php b/src/Symfony/Component/Security/Tests/Http/Firewall/ContextListenerTest.php
index 646ed2357a..d360ef55ec 100644
--- a/src/Symfony/Component/Security/Tests/Http/Firewall/ContextListenerTest.php
+++ b/src/Symfony/Component/Security/Tests/Http/Firewall/ContextListenerTest.php
@@ -125,4 +125,47 @@ class ContextListenerTest extends \PHPUnit_Framework_TestCase
 
         $this->assertFalse($request->hasSession());
     }
+
+    /**
+     * @dataProvider provideInvalidToken
+     */
+    public function testInvalidTokenInSession($token)
+    {
+        $context = $this->getMock('Symfony\Component\Security\Core\SecurityContextInterface');
+        $event = $this->getMockBuilder('Symfony\Component\HttpKernel\Event\GetResponseEvent')
+            ->disableOriginalConstructor()
+            ->getMock();
+        $request = $this->getMock('Symfony\Component\HttpFoundation\Request');
+        $session = $this->getMockBuilder('Symfony\Component\HttpFoundation\Session\Session')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $event->expects($this->any())
+            ->method('getRequest')
+            ->will($this->returnValue($request));
+        $request->expects($this->any())
+            ->method('hasPreviousSession')
+            ->will($this->returnValue(true));
+        $request->expects($this->any())
+            ->method('getSession')
+            ->will($this->returnValue($session));
+        $session->expects($this->any())
+            ->method('get')
+            ->with('_security_key123')
+            ->will($this->returnValue(serialize($token)));
+        $context->expects($this->once())
+            ->method('setToken')
+            ->with(null);
+
+        $listener = new ContextListener($context, array(), 'key123');
+        $listener->handle($event);
+    }
+
+    public function provideInvalidToken()
+    {
+        return array(
+            array(new \__PHP_Incomplete_Class()),
+            array(null),
+        );
+    }
 }