This webpage however doesn’t explain how to add an extra set of Local Folders.
This is how you can create them.

Open prefs.js with your favorite editor. This file is located inside the profile directory in you thunderbird hidden directory.
Don’t change this file when thunderbird is running.
the serverX and accountX must be unique and could be different on your system

Search for the section defining the existing “Local Folders”, this looks something like this:
user_pref("mail.server.server3.directory", "/home/johan/.thunderbird/pd19vach.default/Mail/Local Folders");
user_pref("mail.server.server3.directory-rel", "[ProfD]Mail/Local Folders");
user_pref("mail.server.server3.hostname", "Local Folders");
user_pref("mail.server.server3.name", "Local Folders");
user_pref("mail.server.server3.type", "none");
user_pref("mail.server.server3.userName", "nobody");


Copy those lines and edit them to your needs:
user_pref("mail.server.server4.directory", "/home/johan/.thunderbird/pd19vach.default/Mail/new_local_folders");
user_pref("mail.server.server4.directory-rel", "[ProfD]Mail/new_local_folders");
user_pref("mail.server.server4.hostname", "New Local Folders");
user_pref("mail.server.server4.name", "New Local Folders");
user_pref("mail.server.server4.type", "none");
user_pref("mail.server.server4.userName", "nobody");


Also add following line:
user_pref("mail.account.account4.server", "server4");


And edit following line:
user_pref("mail.accountmanager.accounts", "account1,account2,account3,account4");


When the changes are made in the prefs.js you can create the new defined local folders. A subdirectory has to be created otherwise it won’t show up in Thunderbird.
mkdir /home/johan/.thunderbird/pd19vach.default/Mail/new_local_folders
mkdir /home/johan/.thunderbird/pd19vach.default/Mail/new_local_folders/Inbox
touch /home/johan/.thunderbird/pd19vach.default/Mail/new_local_folders/Inbox.msf


If everything goes well the new defined local folders directory appears when you open thunderbird.

The installer still doesn’t support LVM. To be able to install Ubuntu on my LVM partitions I had to follow the steps described in one of my previous posts.

Previously I installed the i386 bit version of distributions on my laptop although it is a x86_64 system. But this time I went for the amd64 version.

You can check if you really have a 64bit processor by checking if there is a “lm” flag for your processor:
$ cat /proc/cpuinfo | grep lm

Using the 64bit version gave some problems, but they are all fixed now:

thunderbird-lightning

The lightning plugin you can download from the add-ons site of thunderbird is the i386 version which doesn’t work with a x86_64 thunderbird. Ubuntu provides a lightning package but this contains some old version. Luckily you can find the x86_64 xpi here: http://releases.mozilla.org/pub/mozilla.org/calendar/lightning/releases/0.9/contrib/linux-x86_64/

sun javaws

The sun javaws isn’t available for x86_64. The openJDK version is available but not all java applications work with that Java WebStart. You can manually install the i386 version of sun-java6-bin:
sudo apt-get install ia32-sun-java6-bin
You can now find the working javaws in following directory: /usr/lib/jvm/ia32-java-6-sun-1.6.0.10/bin/javaws

BTW … Fedora 10 will be released in 18 days