emacs 23.4.1 org-caldav with radicale caldav-server

To get this working I had to comment out a line in http://randomsample.de/url-dav.el

$ diff url-dav.el url-dav.el~
61c61
<        ;; (fboundp 'xml-expand-namespace)
---
>        (fboundp 'xml-expand-namespace)