FYI- We changed the logic in the repository builder so that the list of classes you can instantiate in repository.xml isn't limited to a predefined set in repository.py. One effect of that is that you now have to specify a fully qualified class name (twisted.web2.dav.static.DAVFile, not DAVFile) in repository.xml. Refresh your repository.xml from one of the examples and you should be OK. http://trac.macosforge.org/projects/calendarserver/ticket/66 -wsv