diff -r 54b8a1f249fb -r 6465a3e9d7ac web/views/formrenderers.py
--- a/web/views/formrenderers.py	Tue Oct 13 15:09:22 2015 +0200
+++ b/web/views/formrenderers.py	Fri Sep 18 18:04:05 2015 +0200
@@ -241,7 +241,7 @@
         if form.fieldsets_in_order:
             fieldsets = form.fieldsets_in_order
         else:
-            fieldsets = byfieldset.iterkeys()
+            fieldsets = byfieldset
         for fieldset in list(fieldsets):
             try:
                 fields = byfieldset.pop(fieldset)