Index: /django/branches/newforms-admin/django/newforms/formsets.py
===================================================================
--- /django/branches/newforms-admin/django/newforms/formsets.py	(revision 5671)
+++ /django/branches/newforms-admin/django/newforms/formsets.py	(working copy)
@@ -146,6 +146,8 @@
         return '%s-%s' % (self.prefix, index)
 
     def is_valid(self):
+        if not self.is_bound:
+            return False
         self.full_clean()
         return self._is_valid
 
@@ -159,4 +161,4 @@
     for formset in formsets:
         if not formset.is_valid():
             return False
-    return True
\ No newline at end of file
+    return True