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Changes between Initial Version and Version 2 of Ticket #15708

-              initial
+              v2
 Something like this will trigger the error:
+{{{
 class TestForm(forms.Form)
     name = forms.CharField()
 …
         name = self.cleaned_data['name'] # this is the offending line
         return self.cleaned_data
+}}}
 If you display that form in a template and the user enters nothing into the field, it causes a KeyError which leads to a 500 error.  This same code used to work in Django 1.2, but it doesn't work in 1.3 anymore.