The problem can be corrected by updating your system to the following package versions: Ubuntu 11.04: thunderbird 3.1.11+build2+nobinonly-0ubuntu0.11.04.1 Ubuntu 10.10: thunderbird 3.1.11+build2+nobinonly-0ubuntu0.10.10.1 Ubuntu 10.04 LTS: thunderbird 3.1.11+build2+nobinonly-0ubuntu0.10.04.1 After a standard system update you need to restart Thunderbird to make all the necessary changes.
https://ubuntu.com/security/notices/USN-1150-1
CVE-2011-0083, CVE-2011-0085, CVE-2011-2362, CVE-2011-2363,
CVE-2011-2364, CVE-2011-2365, CVE-2011-2371, CVE-2011-2373,
CVE-2011-2374, CVE-2011-2376, CVE-2011-2377
https://launchpad.net/ubuntu/+source/thunderbird/3.1.11+build2+nobinonly-0ubuntu0.11.04.1 https://launchpad.net/ubuntu/+source/thunderbird/3.1.11+build2+nobinonly-0ubuntu0.10.10.1 https://launchpad.net/ubuntu/+source/thunderbird/3.1.11+build2+nobinonly-0ubuntu0.10.04.1
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