diff --git a/scrapy/trunk/scrapy/item/adaptors.py b/scrapy/trunk/scrapy/item/adaptors.py
index dd06a2422..448870cf0 100644
--- a/scrapy/trunk/scrapy/item/adaptors.py
+++ b/scrapy/trunk/scrapy/item/adaptors.py
@@ -56,6 +56,9 @@ class AdaptorPipe(list):
         elif callable(other):
             return AdaptorPipe(self + [other])
 
+    def __repr__(self):
+        return '<AdaptorPipe %s >' % super(AdaptorPipe, self).__repr__()
+
 def adaptize(adaptor, my_args=None):
     """
     This decorator helps you add to your pipelines adaptors that are able
diff --git a/scrapy/trunk/scrapy/item/models.py b/scrapy/trunk/scrapy/item/models.py
index c30286d15..09554c993 100644
--- a/scrapy/trunk/scrapy/item/models.py
+++ b/scrapy/trunk/scrapy/item/models.py
@@ -14,7 +14,7 @@ class ScrapedItem(object):
         Set the adaptors to use for this item. Receives a dict of the adaptors
         desired for each attribute and returns the item itself.
         """
-        _adaptors_dict = dict(item for item in adaptors_dict.items() if isinstance(item[1], AdaptorPipe))
+        _adaptors_dict = dict((attrib, AdaptorPipe(pipe)) for attrib, pipe in adaptors_dict.items() if hasattr(pipe, '__iter__'))
         self.__dict__['_adaptors_dict'] = _adaptors_dict
         return self