Hello fellow Django users,

>From time to time users of one of my applications has problems with
formsets. More specifically:

...my stuff...
 File "/usr/lib/python2.4/site-packages/django/forms/models.py", line
399, in __init__
   super(BaseModelFormSet, self).__init__(**defaults)

 File "/usr/lib/python2.4/site-packages/django/forms/formsets.py",
line 47, in __init__
   self._construct_forms()

 File "/usr/lib/python2.4/site-packages/django/forms/formsets.py",
line 91, in _construct_forms
   for i in xrange(self.total_form_count()):

 File "/usr/lib/python2.4/site-packages/django/forms/formsets.py",
line 70, in total_form_count
   return self.management_form.cleaned_data[TOTAL_FORM_COUNT]

 File "/usr/lib/python2.4/site-packages/django/forms/formsets.py",
line 57, in _management_form
   raise ValidationError('ManagementForm data is missing or has been
tampered with')

ValidationError: [u'ManagementForm data is missing or has been tampered with']

This only happens for Internet Explorer 6, 7 and 8 users. When looking
at the source of the page, all the correct fields are there(even in
the browsers mentioned). When I check request.POST I find all the
fields from the management form(total forms, initial forms and max num
forms). The only difference I can see from the error in the production
environment is that max num forms is missing from request.POST, could
this be causing the error?

Kind regards,
Knut Nesheim

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