diff --git a/src/Symfony/Component/Form/Extension/Validator/Validator/DelegatingValidator.php b/src/Symfony/Component/Form/Extension/Validator/Validator/DelegatingValidator.php
index 992650d8f5..414cfccf8a 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Validator/DelegatingValidator.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Validator/DelegatingValidator.php
@@ -66,14 +66,18 @@ class DelegatingValidator implements FormValidatorInterface
                         foreach ($propertyPath->getElements() as $element) {
                             $children = $child->getChildren();
                             if (!isset($children[$element])) {
-                                $form->addError($error);
+                                if ($form->isSynchronized()) {
+                                    $form->addError($error);
+                                }
                                 break;
                             }
 
                             $child = $children[$element];
                         }
 
-                        $child->addError($error);
+                        if ($child->isSynchronized()) {
+                            $child->addError($error);
+                        }
                     }
                 }
             } elseif (count($violations = $this->validator->validate($form))) {
@@ -85,12 +89,16 @@ class DelegatingValidator implements FormValidatorInterface
 
                     foreach ($mapping as $mappedPath => $child) {
                         if (preg_match($mappedPath, $propertyPath)) {
-                            $child->addError($error);
+                            if ($child->isSynchronized()) {
+                                $child->addError($error);
+                            }
                             continue 2;
                         }
                     }
 
-                    $form->addError($error);
+                    if ($form->isSynchronized()) {
+                        $form->addError($error);
+                    }
                 }
             }
         }
diff --git a/tests/Symfony/Tests/Component/Form/Extension/Validator/Validator/DelegatingValidatorTest.php b/tests/Symfony/Tests/Component/Form/Extension/Validator/Validator/DelegatingValidatorTest.php
index 2b8222233a..4435523b73 100644
--- a/tests/Symfony/Tests/Component/Form/Extension/Validator/Validator/DelegatingValidatorTest.php
+++ b/tests/Symfony/Tests/Component/Form/Extension/Validator/Validator/DelegatingValidatorTest.php
@@ -12,9 +12,11 @@
 namespace Symfony\Tests\Component\Form\Extension\Validator\Validator;
 
 use Symfony\Component\Form\FormBuilder;
+use Symfony\Component\Form\CallbackTransformer;
 use Symfony\Component\Form\FormError;
 use Symfony\Component\Form\Util\PropertyPath;
 use Symfony\Component\Form\Extension\Validator\Validator\DelegatingValidator;
+use Symfony\Component\Form\Exception\TransformationFailedException;
 use Symfony\Component\Validator\ConstraintViolation;
 use Symfony\Component\Validator\ExecutionContext;
 
@@ -85,6 +87,24 @@ class DelegatingValidatorTest extends \PHPUnit_Framework_TestCase
         return $this->getBuilder($name, $propertyPath)->getForm();
     }
 
+    protected function getNonSynchronizedForm()
+    {
+        $form = $this->getBuilder()
+            ->appendClientTransformer(new CallbackTransformer(
+                function ($normValue) {
+                    return $normValue;
+                },
+                function () {
+                    throw new TransformationFailedException('Failed');
+                }
+            ))
+            ->getForm();
+
+        $form->bind('foobar');
+
+        return $form;
+    }
+
     protected function getMockForm()
     {
         return $this->getMock('Symfony\Tests\Component\Form\FormInterface');
@@ -118,6 +138,21 @@ class DelegatingValidatorTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(array($this->getFormError()), $form->getErrors());
     }
 
+    public function testNoFormErrorsOnNonSynchronizedForm()
+    {
+        $form = $this->getNonSynchronizedForm();
+
+        $this->delegate->expects($this->once())
+            ->method('validate')
+            ->will($this->returnValue(array(
+                $this->getConstraintViolation('constrainedProp')
+            )));
+
+        $this->validator->validate($form);
+
+        $this->assertEquals(array(), $form->getErrors());
+    }
+
     public function testFormErrorsOnChild()
     {
         $parent = $this->getForm();