Publishing doesn't work with RPI server because they don't allow creation of a sub-directory for attachments or extra data.
Mike says he might consider making that work but not in the short term as it would be a lot of new work for them -- RPI server is built on a calendar database, not on a general resource repository.
What could Chandler do? Also difficult but certainly possible to store the extra data Chandler needs inside calendar events (XML-format attachments)
Subscribing
Subscribing with the wrong username: fails rather silently
Subscribing with the right username: fails on PUT of non-calendar files
Does it even prompt for password?
Is it a bug that the calendar canvas doesn't even show up? "All" is selected instead of "calendar". Maybe the blank grey canvas should say "No items in this collection".
Chandler does a PROPFIND for displayname but then doesn't use it! Instead the subscribed calendar gets a name of "" (blank)