I tried the instructions here:
but when I type
sudo apt-get update
Reading package lists... Done W: GPG error: http://ppa.launchpad.net jaunty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EF4186FE247510BE W: You may want to run apt-get update to correct these problems
I downloaded the tarball here and it doesn't run (says "File not found" when I try to run thunderbird or thunderbird-bin). The README.txt is useless as it just points back to the useless Release notes.
I'm running GNOME, no strange window managers or anything.
For want of a nail
By the way, are there any Linux mail clients that can simply auto-populate the To: field with the contacts from an LDAP/CardDAV server (Zimbra hosted at mail.01.com) when I compose an email? That's all I really want.