[Zope] Errors reStructuredText under 2.7

[Alec Munro]

Hi List,

This happens whenever I try to add a reStructuredText document in the 
ZMI, and also whenever I try to render a page template containing a call 
to ReST.

I get the following Zope Error:

*Error Type: AttributeError*
*Error Value: 'module' object has no attribute 'TitledHelpFormatter'

Is this a known issue, or specific to my installation?

Thanks,

Alec Munro
*