diff --git a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
index c69ca843e8..b3c89d18eb 100644
--- a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
+++ b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
@@ -14,6 +14,7 @@ namespace Symfony\Bridge\Twig\NodeVisitor;
 use Symfony\Bridge\Twig\Node\TransNode;
 use Symfony\Bridge\Twig\Node\TransDefaultDomainNode;
 use Twig\Environment;
+use Twig\Node\BlockNode;
 use Twig\Node\Expression\ArrayExpression;
 use Twig\Node\Expression\AssignNameExpression;
 use Twig\Node\Expression\ConstantExpression;
@@ -21,6 +22,7 @@ use Twig\Node\Expression\FilterExpression;
 use Twig\Node\Expression\NameExpression;
 use Twig\Node\ModuleNode;
 use Twig\Node\Node;
+use Twig\Node\SetNode;
 use Twig\NodeVisitor\AbstractNodeVisitor;
 
 /**
@@ -48,7 +50,7 @@ class TranslationDefaultDomainNodeVisitor extends AbstractNodeVisitor
      */
     protected function doEnterNode(Node $node, Environment $env)
     {
-        if ($node instanceof Node_Block || $node instanceof ModuleNode) {
+        if ($node instanceof BlockNode || $node instanceof ModuleNode) {
             $this->scope = $this->scope->enter();
         }
 
@@ -62,7 +64,7 @@ class TranslationDefaultDomainNodeVisitor extends AbstractNodeVisitor
                 $name = new AssignNameExpression($var, $node->getTemplateLine());
                 $this->scope->set('domain', new NameExpression($var, $node->getTemplateLine()));
 
-                return new Node_Set(false, new Node(array($name)), new Node(array($node->getNode('expr'))), $node->getTemplateLine());
+                return new SetNode(false, new Node(array($name)), new Node(array($node->getNode('expr'))), $node->getTemplateLine());
             }
         }
 
@@ -104,7 +106,7 @@ class TranslationDefaultDomainNodeVisitor extends AbstractNodeVisitor
             return false;
         }
 
-        if ($node instanceof Node_Block || $node instanceof ModuleNode) {
+        if ($node instanceof BlockNode || $node instanceof ModuleNode) {
             $this->scope = $this->scope->leave();
         }
 
diff --git a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
index 1d9dc7ce57..1e0617ebe2 100644
--- a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
@@ -281,7 +281,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface
 
         foreach ($items as $key => $item) {
             if (!$tagKeys) {
-                yield $key => $f($item, self::TAGS_PREFIX.$key, $itemTags);
+                yield $key => $f($item, static::TAGS_PREFIX.$key, $itemTags);
                 continue;
             }
             if (!isset($tagKeys[$key])) {
@@ -306,7 +306,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface
                 $tagVersions = $tagKeys = null;
 
                 foreach ($bufferedItems as $key => $item) {
-                    yield $key => $f($item, self::TAGS_PREFIX.$key, $itemTags);
+                    yield $key => $f($item, static::TAGS_PREFIX.$key, $itemTags);
                 }
                 $bufferedItems = null;
             }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 840b670f16..6c2f1bf6e8 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -175,7 +175,7 @@ class PhpDumper extends Dumper
             }
         }
         if ($unusedEnvs) {
-            throw new EnvParameterException($unusedEnvs);
+            throw new EnvParameterException($unusedEnvs, null, 'Environment variables "%s" are never used. Please, check your container\'s configuration.');
         }
 
         return $code;
diff --git a/src/Symfony/Component/DependencyInjection/Exception/EnvParameterException.php b/src/Symfony/Component/DependencyInjection/Exception/EnvParameterException.php
index 44dbab45b6..3839a4633b 100644
--- a/src/Symfony/Component/DependencyInjection/Exception/EnvParameterException.php
+++ b/src/Symfony/Component/DependencyInjection/Exception/EnvParameterException.php
@@ -18,8 +18,8 @@ namespace Symfony\Component\DependencyInjection\Exception;
  */
 class EnvParameterException extends InvalidArgumentException
 {
-    public function __construct(array $usedEnvs, \Exception $previous = null)
+    public function __construct(array $envs, \Exception $previous = null, $message = 'Incompatible use of dynamic environment variables "%s" found in parameters.')
     {
-        parent::__construct(sprintf('Incompatible use of dynamic environment variables "%s" found in parameters.', implode('", "', $usedEnvs)), 0, $previous);
+        parent::__construct(sprintf($message, implode('", "', $envs)), 0, $previous);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index fe53b94100..bd8a95bab9 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -336,7 +336,7 @@ class PhpDumperTest extends TestCase
 
     /**
      * @expectedException \Symfony\Component\DependencyInjection\Exception\EnvParameterException
-     * @expectedExceptionMessage Incompatible use of dynamic environment variables "FOO" found in parameters.
+     * @expectedExceptionMessage Environment variables "FOO" are never used. Please, check your container's configuration.
      */
     public function testUnusedEnvParameter()
     {
diff --git a/src/Symfony/Component/Form/FormFactory.php b/src/Symfony/Component/Form/FormFactory.php
index 4360a62567..886cdee630 100644
--- a/src/Symfony/Component/Form/FormFactory.php
+++ b/src/Symfony/Component/Form/FormFactory.php
@@ -115,7 +115,13 @@ class FormFactory implements FormFactoryInterface
 
         // user options may override guessed options
         if ($typeGuess) {
-            $options = array_merge($typeGuess->getOptions(), $options);
+            $attrs = array();
+            $typeGuessOptions = $typeGuess->getOptions();
+            if (isset($typeGuessOptions['attr']) && isset($options['attr'])) {
+                $attrs = array('attr' => array_merge($typeGuessOptions['attr'], $options['attr']));
+            }
+
+            $options = array_merge($typeGuessOptions, $options, $attrs);
         }
 
         return $this->createNamedBuilder($property, $type, $data, $options);
diff --git a/src/Symfony/Component/Form/Tests/FormFactoryTest.php b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
index 30aea951fb..6029f34a8c 100644
--- a/src/Symfony/Component/Form/Tests/FormFactoryTest.php
+++ b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
@@ -310,7 +310,7 @@ class FormFactoryTest extends TestCase
             ->with('Application\Author', 'firstName')
             ->will($this->returnValue(new TypeGuess(
                 'Symfony\Component\Form\Extension\Core\Type\TextType',
-                array('attr' => array('maxlength' => 10)),
+                array('attr' => array('class' => 'foo', 'maxlength' => 10)),
                 Guess::MEDIUM_CONFIDENCE
             )));
 
@@ -318,7 +318,7 @@ class FormFactoryTest extends TestCase
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array('attr' => array('maxlength' => 11)))
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array('attr' => array('class' => 'foo', 'maxlength' => 11)))
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty(