  deps = django>=1.4.1
  
  [testenv:py2.6-django1.3]
  basepython = python2.6
  deps = django>=1.3.2
 
</s> remove deps = django>=1.4.1
 </s> add deps = django==1.4.1 </s> remove deps = django>=1.3.2
 </s> add deps = django==1.3.3 </s> remove deps = django>=1.4.1
 </s> add deps = django==1.4.1 </s> remove         opts = cls._meta.concrete_model._meta
 </s> add         opts = get_concrete_model(cls)._meta
deps = django==1.3.3
  deps = django>=1.4.1
  
  [testenv:py2.6-django1.3]
  basepython = python2.6
deps = django==1.3.3
keep keep keep keep replace
 Fix serialization issue with Django 1.3 
tox.ini