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The mp_roundup.py script bypasses Roundup's tracker 
instance loading mechanisms. I believe that mod_python has a 
shared module namespace. This means that only one tracker 
will be loaded when imp.load_package() is called and the 
"mod_python_roundup_tracker" name is not changed. 
 
In your second use of the mp_roundup.py script, try changing 
the "mod_python_roundup_tracker" name to something else 
(eg. "another_mod_python_roundup_tracker") 
 
A better solution to this would be for mp_roundup.py to use the 
roundup.instance module to load the tracker, as it deals with 
these namespace collision issues.