diff --git a/mongoengine/fields.py b/mongoengine/fields.py
index 8fcb1d62..f65ca15d 100644
--- a/mongoengine/fields.py
+++ b/mongoengine/fields.py
@@ -331,12 +331,12 @@ class ListField(BaseField):
         try:
             [self.field.validate(item) for item in value]
         except Exception, err:
-            raise ValidationError('Invalid ListField item (%s)' % str(err))
+            raise ValidationError('Invalid ListField item (%s)' % str(item))
 
     def prepare_query_value(self, op, value):
         if op in ('set', 'unset'):
-            return [self.field.to_mongo(v) for v in value]
-        return self.field.to_mongo(value)
+            return [self.field.prepare_query_value(op, v) for v in value]
+        return self.field.prepare_query_value(op, value)
 
     def lookup_member(self, member_name):
         return self.field.lookup_member(member_name)
diff --git a/mongoengine/queryset.py b/mongoengine/queryset.py
index 6e546564..a3d4c544 100644
--- a/mongoengine/queryset.py
+++ b/mongoengine/queryset.py
@@ -592,6 +592,10 @@ class QuerySet(object):
 
         mongo_query = {}
         for key, value in query.items():
+            if key == "__raw__":
+                mongo_query.update(value)
+                continue
+
             parts = key.split('__')
             indices = [(i, p) for i, p in enumerate(parts) if p.isdigit()]
             parts = [part for part in parts if not part.isdigit()]
diff --git a/tests/fields.py b/tests/fields.py
index e30f843e..1df484bf 100644
--- a/tests/fields.py
+++ b/tests/fields.py
@@ -545,6 +545,7 @@ class FieldTest(unittest.TestCase):
         user.save()
         
         user = User.objects(bookmarks__all=[post_1, link_1]).first()
+        print User.objects(bookmarks__all=[post_1, link_1]).explain()
         
         self.assertEqual(user.bookmarks[0], post_1)
         self.assertEqual(user.bookmarks[1], link_1)