Cascade persist update foreign key for all unchanged entities

1) testOptimisticTimestampSetsDefaultValue(Doctrine\Tests\ORM\Functional\Locking\OptimisticTest)
strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead
/home/eric/doctrine_trunk/tests/Doctrine/Tests/ORM/Functional/Locking/OptimisticTest.php:126

2) testOptimisticTimestampFailureThrowsException(Doctrine\Tests\ORM\Functional\Locking\OptimisticTest)
DateTime::createFromFormat(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead
/home/eric/doctrine_trunk/lib/Doctrine/DBAL/Types/DateTimeType.php:33
/home/eric/doctrine_trunk/lib/Doctrine/ORM/Internal/Hydration/AbstractHydrator.php:225
/home/eric/doctrine_trunk/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php:239
/home/eric/doctrine_trunk/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php:112
/home/eric/doctrine_trunk/lib/Doctrine/ORM/Internal/Hydration/AbstractHydrator.php:102
/home/eric/doctrine_trunk/lib/Doctrine/ORM/AbstractQuery.php:511
/home/eric/doctrine_trunk/lib/Doctrine/ORM/AbstractQuery.php:387
/home/eric/doctrine_trunk/tests/Doctrine/Tests/ORM/Functional/Locking/OptimisticTest.php:136

3) testJoinedSubclassPersisterRequiresSpecificOrderOfMetadataReflFieldsArray(Doctrine\Tests\ORM\Functional\Ticket\DDC168Test)
PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'salary' cannot be null
/home/eric/doctrine_trunk/lib/Doctrine/ORM/Persisters/JoinedSubclassPersister.php:190
/home/eric/doctrine_trunk/lib/Doctrine/ORM/UnitOfWork.php:698
/home/eric/doctrine_trunk/lib/Doctrine/ORM/UnitOfWork.php:283
/home/eric/doctrine_trunk/lib/Doctrine/ORM/EntityManager.php:288
/home/eric/doctrine_trunk/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC168Test.php:34

    public function testFlushDoesNotIssueUnnecessaryUpdates()
    {
        
        $user = new CmsUser;
        $user->name = 'Guilherme';
        $user->username = 'gblanco';
        $user->status = 'developer';
        
        $address = new CmsAddress;
        $address->country = 'Germany';
        $address->city = 'Berlin';
        $address->zip = '12345';
        
        $address->user = $user;
        $user->address = $address;
        
        $this->_em->persist($user);
        
        $this->_em->flush();
        $this->_em->clear();
        
        // show SQL from here on...
        $this->_em->getConnection()->getConfiguration()->setSqlLogger(new \Doctrine\DBAL\Logging\EchoSqlLogger);
        
        
        $query = $this->_em->createQuery('select u, a from Doctrine\Tests\Models\CMS\CmsUser u join u.address a');
        echo "QUERY!".PHP_EOL;
        $user2 = $query->getSingleResult();
        
        echo "FLUSH!".PHP_EOL;
        $this->_em->flush();
        
    }

SELECT c0_.id AS id0, c0_.status AS status1, c0_.username AS username2, c0_.name AS name3, c1_.id AS id4, c1_.topic AS topic5, c1_.text AS text6, c1_.user_id AS user_id7 FROM cms_users c0_ INNER JOIN cms_articles c1_ ON c0_.id = c1_.user_id
FLUSH!
UPDATE cms_users SET name = ? WHERE id = ?
array(2) {
  [0]=>
  string(6) "FooBar"
  [1]=>
  int(17)
}
UPDATE cms_articles SET user_id = ? WHERE id = ?
array(2) {
  [0]=>
  int(17)
  [1]=>
  int(2)
}
DONE!
DELETE FROM cms_users_groups
DELETE FROM cms_groups
DELETE FROM cms_addresses
DELETE FROM cms_phonenumbers
DELETE FROM cms_articles
DELETE FROM cms_users

public function testFlushDoesNotIssueUnnecessaryUpdates()
    {

        $user = new CmsUser;
        $user->name = 'Guilherme';
        $user->username = 'gblanco';
        $user->status = 'developer';

        $address = new CmsAddress;
        $address->country = 'Germany';
        $address->city = 'Berlin';
        $address->zip = '12345';

        $article = new \Doctrine\Tests\Models\CMS\CmsArticle();
        $article->text = "Lorem ipsum dolor sunt.";
        $article->topic = "A Test Article!";
        $article->setAuthor($user);
        $user->articles[] = $article;


        $address->user = $user;
        $user->address = $address;

        $this->_em->persist($user);

        $this->_em->flush();
        $this->_em->clear();

        // show SQL from here on...
        $this->_em->getConnection()->getConfiguration()->setSqlLogger(new \Doctrine\DBAL\Logging\EchoSqlLogger);


        //$query = $this->_em->createQuery('select u, a from Doctrine\Tests\Models\CMS\CmsUser u join u.address a');
        $query = $this->_em->createQuery('select u, a from Doctrine\Tests\Models\CMS\CmsUser u join u.articles a');
        echo "QUERY!".PHP_EOL;
        $user2 = $query->getSingleResult();

        $user2->name = "FooBar";

        echo "FLUSH!".PHP_EOL;
        $this->_em->flush();

        echo "DONE!".PHP_EOL;

    }