Install/Update Thunderbird 17.0 in Ubuntu 12.10/12.04

Mozilla Thunderbird is a free, open source, cross-platform email and news client developed by the Mozilla Foundation.

Features of Thunderbird 17

A Menu Button is now shown to new users by default
Tabs are now drawn in the title bar on Windows
RSS feeds can now be viewed in the Wide View Layout
Various fixes and performance improvements
Various security fixes
Mac OS X 10.5 is no longer supported