In Ubuntu Daniel Sager reported:

When I set up a new CalDAV calendar (in my case the birthday calendar of google contacts), the URL is always truncated after the hash character. This also happens if the # is encoded as %23.
I hope I provided you with all the information you need, otherwise just ask for it!

Performed Steps
---------------

0) Open Evolution
1) File -> New -> Calendar
2) Type = CalDAV
3) Name = MyGoogleContacts
4) URL = caldav://www.google.com/calendar/dav/%23contacts@group.v.calendar.google.com/events
5) Check "Use SSL"
6) Username = user@googlemail.com
7) Click "OK"
8) Open the properies dialog of the created calendar "MyGoogleContacts"

Expected Result
---------------

URL = caldav://www.google.com/calendar/dav/%23contacts@group.v.calendar.google.com/events

Actual Result
-------------

URL = caldav://www.google.com/calendar/dav/

System Info
-----------

~/> lsb_release -rd
Description: Ubuntu 9.10
Release: 9.10
~/> apt-cache policy evolution
evolution:
  Installed: 2.28.1-0ubuntu2
  Candidate: 2.28.1-0ubuntu2
  Version table:
 *** 2.28.1-0ubuntu2 0
        500 http://de.archive.ubuntu.com karmic-updates/main Packages
        100 /var/lib/dpkg/status
     2.28.1-0ubuntu1 0
        500 http://de.archive.ubuntu.com karmic/main Packages

ProblemType: Bug
Architecture: i386
Date: Thu Apr 22 11:09:46 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/evolution
NonfreeKernelModules: nvidia
Package: evolution 2.28.1-0ubuntu2
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-21.59-generic
SourcePackage: evolution
Uname: Linux 2.6.31-21-generic i686

Launchpad ref: https://bugs.edge.launchpad.net/ubuntu/+source/evolution/+bug/568304

Thanks!