Just installed Ubuntu 10.10 beta. Also installed the zimbra client. I missed the desktop icon but I added it, using the application command:
"/home/user/zimbra/zdesktop/linux/prism/zdclient" -webapp "/home/user/zimbra/zdesktop/zdesktop.webapp" -override "/home/user/zimbra/zdesktop/zdesktop.webapp/override.ini" -profile "/home/user/zimbra/zdesktop/profile"

The client tries to start but fails with the error that it "couldn't access zimbra desktop server" connect to the local service.

The service seems to be running:
~$ zimbra/zdesktop/zdesktop status
The daemon is running.

I also see no IPTABLES firewall rules. What now?