upgraded uniqueness hack to work with django >= 1.2
upgraded uniqueness hack to work with django >= 1.2

Pike/elmo,Pike/elmo,mozilla/elmo,AdrianGaudebert/elmo,AdrianGaudebert/elmo,AdrianGaudebert/elmo,mozilla/elmo,mozilla/elmo,mozilla/elmo,Pike/elmo,Pike/elmo