[Zope-CMF] Yet Another Blark Question

[rev_matt_y]

I'm running Blark on CMF 1.2, Zope 2.5.0 final, and I'm unable to 
edit entries.  I can create them, I just can't edit them!  The error 
I get when I go to edit it:

Traceback (innermost last):
  File /var/Zope-2.5.0-src/lib/python/ZPublisher/Publish.py, line 
150, in publish_module
  File /var/Zope-2.5.0-src/lib/python/ZPublisher/Publish.py, line 
114, in publish
  File /var/Zope-2.5.0-src/lib/python/Zope/__init__.py, line 158, in 
zpublisher_exception_hook
    (Object: BLARKENTRY_589877596_1012751085)
  File /var/Zope-2.5.0-src/lib/python/ZPublisher/Publish.py, line 98, 
in publish
  File /var/Zope-2.5.0-src/lib/python/ZPublisher/mapply.py, line 88, 
in mapply
    (Object: <string>)
  File /var/Zope-2.5.0-src/lib/python/ZPublisher/Publish.py, line 39, 
in call_object
    (Object: <string>)
  File /var/Zope-2.5.0-src/lib/python/DocumentTemplate/DT_String.py, 
line 473, in __call__
    (Object: <string>)
  File /var/Zope-2.5.0-src/lib/python/OFS/DTMLMethod.py, line 120, in 
__call__
    (Object: blark_document_edit_form)
  File /var/Zope-2.5.0-src/lib/python/DocumentTemplate/DT_String.py, 
line 473, in __call__
    (Object: blark_document_edit_form)
  File /var/Zope-2.5.0-src/lib/python/DocumentTemplate/DT_Let.py, 
line 76, in render
    (Object: bord="controlInfo.get('borders') and '1' or '0'"
        access="checkViewable(this(),'editable')")
KeyError: isWeblogOwner