sphinx setup breaks hard on 0.6

[Monty Taylor]

Running Sphinx v0.6.2

Exception occurred:
  File "/build/buildd/drizzle-2011.03.2221/docs/pyext/confval.py", line 19, in setup
    indextemplate='pair: %s; configuration value')
TypeError: add_description_unit() got an unexpected keyword argument 'objname'
The full traceback has been saved in /tmp/sphinx-err-wKFf2d.log, if you want to report the issue to the author.
Please also report this if it was a user error, so that a better error message can be provided next time.
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