Today I enabled threaded (mpm worker) mod_python to try to boost performance of the RescueTime back end and started noticing the following error showing up in the logs: File "/opt/lib/python2.5/site-packages/django/db/models/query.py", line 497, in _filter_or_exclude clone = self._clone() File "/opt/lib/python2.5/site-packages/django/db/models/query.py", line 595, in _clone query = self.query.clon