At Zope startup time... (nothing to do with Repoze, this is a stock  
Zope+Plone install)

Traceback (most recent call last):
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
Zope2/Startup/zopectl.py", line 329, in ?
     main()
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
Zope2/Startup/zopectl.py", line 287, in main
     options.realize(args)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
Zope2/Startup/zopectl.py", line 95, in realize
     ZDOptions.realize(self, *args, **kw)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
zdaemon/zdoptions.py", line 273, in realize
     self.load_schema()
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
zdaemon/zdoptions.py", line 321, in load_schema
     self.schema = ZConfig.loadSchema(self.schemafile)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/loader.py", line 31, in loadSchema
     return SchemaLoader().loadURL(url)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/loader.py", line 65, in loadURL
     return self.loadResource(r)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/loader.py", line 159, in loadResource
     schema = ZConfig.schema.parseResource(resource, self)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/schema.py", line 27, in parseResource
     xml.sax.parse(resource.file, parser)
   File "/Users/chrism/opt/Python-2.4.3/lib/python2.4/xml/sax/ 
__init__.py", line 33, in parse
     parser.parse(source)
   File "/Users/chrism/opt/Python-2.4.3/lib/python2.4/xml/sax/ 
expatreader.py", line 107, in parse
     xmlreader.IncrementalParser.parse(self, source)
   File "/Users/chrism/opt/Python-2.4.3/lib/python2.4/xml/sax/ 
xmlreader.py", line 123, in parse
     self.feed(buffer)
   File "/Users/chrism/opt/Python-2.4.3/lib/python2.4/xml/sax/ 
expatreader.py", line 207, in feed
     self._parser.Parse(data, isFinal)
   File "/Users/chrism/opt/Python-2.4.3/lib/python2.4/xml/sax/ 
expatreader.py", line 300, in start_element
     self._cont_handler.startElement(name, AttributesImpl(attrs))
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/schema.py", line 99, in startElement
     getattr(self, "start_" + name)(attrs)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/schema.py", line 475, in start_schema
     keytype, valuetype, datatype = self.get_sect_typeinfo(attrs)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/schema.py", line 201, in get_sect_typeinfo
     datatype = self.get_datatype(attrs, "datatype", "null", base)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/schema.py", line 194, in get_datatype
     return self._registry.get(dtname)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/datatypes.py", line 398, in get
     t = self.search(name)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
ZConfig/datatypes.py", line 423, in search
     package = __import__(n, g, g, component)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
Zope2/Startup/datatypes.py", line 21, in ?
     import OFS.Uninstalled
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
OFS/Uninstalled.py", line 16, in ?
     import  SimpleItem, Globals, Acquisition
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
OFS/SimpleItem.py", line 26, in ?
     import AccessControl.Role, AccessControl.Owned, App.Common
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
AccessControl/Role.py", line 19, in ?
     from Globals import DTMLFile, MessageDialog, Dictionary
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
Globals/__init__.py", line 34, in ?
     from App.special_dtml import HTML, HTMLFile, DTMLFile
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
App/special_dtml.py", line 73, in ?
     from Shared.DC.Scripts.Bindings import Bindings
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
Shared/DC/Scripts/Bindings.py", line 354, in ?
     InitializeClass(Bindings)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
App/class_init.py", line 69, in default__class_init__
     AccessControl.Permission.registerPermissions 
(self.__ac_permissions__)
   File "/Users/chrism/projects/repoze-devel/stockplone/lib/python/ 
AccessControl/Permission.py", line 132, in registerPermissions
     Products.__ac_permissions__=(
AttributeError: 'module' object has no attribute '__ac_permissions__'

We may need to see what that's about and fix it upstream.