diff --git a/lib/Doctrine/Hydrate/Record.php b/lib/Doctrine/Hydrate/Record.php
index e3830c6d3..40377efac 100644
--- a/lib/Doctrine/Hydrate/Record.php
+++ b/lib/Doctrine/Hydrate/Record.php
@@ -108,7 +108,7 @@ class Doctrine_Hydrate_Record extends Doctrine_Object
     public function flush()
     {
         // take snapshots from all initialized collections
-        foreach (array_unique($this->_collections) as $key => $coll) {
+        foreach ($this->_collections as $key => $coll) {
             $coll->takeSnapshot();
         }
         foreach ($this->_tables as $table) {
diff --git a/tests/run.php b/tests/run.php
index dfebd5057..fb65fe6dc 100644
--- a/tests/run.php
+++ b/tests/run.php
@@ -176,6 +176,8 @@ $test->addTestCase(new Doctrine_Relation_TestCase());
 //$test->addTestCase(new Doctrine_Relation_Access_TestCase());
 //$test->addTestCase(new Doctrine_Relation_ManyToMany_TestCase());
 
+$test->addTestCase(new Doctrine_Relation_ManyToMany2_TestCase());
+
 
 $test->addTestCase(new Doctrine_Relation_OneToMany_TestCase());