ZipPath instance has no attribute 'setContent'

New submission from truekonrads <[email protected]>:

Traceback when running trial on twisted.
{{{  
import pkg_resources
Traceback (most recent call last):
  File "C:\Documents and Settings\Konrads\My Documents\Twisted\twisted\python\usage.py", line 241, in parseOptions
    self.postOptions()
  File "C:\Documents and Settings\Konrads\My Documents\Twisted\twisted\scripts\trial.py", line 293, in postOptions
    self['reporter'] = self._loadReporterByName(self['reporter'])
  File "C:\Documents and Settings\Konrads\My Documents\Twisted\twisted\scripts\trial.py", line 279, in _loadReporterByName
    for p in plugin.getPlugins(itrial.IReporter):
  File "C:\Documents and Settings\Konrads\My Documents\Twisted\twisted\plugin.py", line 200, in getPlugins
    allDropins = getCache(package)
--- <exception caught here> ---
  File "C:\Documents and Settings\Konrads\My Documents\Twisted\twisted\plugin.py", line 179, in getCache
    dropinPath.setContent(pickle.dumps(dropinDotCache))
exceptions.AttributeError: ZipPath instance has no attribute 'setContent'
}}}

Platform is Twisted HEAD as of Aug 28/09, Win32, Python 2.6, 

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Type     : defect
Component: core
Keywords : 
Priority : normal
Nosy     : 
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http://twistedmatrix.com/trac/ticket/3985