Logged In: YES 
user_id=8719

this must be done by a special action handler in order to
return content of "text/calendar" type.  the handler in it's
.handle method should do something like this:

    self.client.header(
        {'Content-Type': 'text/calendar',
'Cache-Control':'no-cache'},
        response=200)

and then return rfc2445 content.

please see "Defining new web actions" in "Customising
Roundup" for details on action handlers.

by the way, i wonder how roundup classic schema may be
mapped to iCalendar objects?