A number of security vulnerabilities have been discovered in previous versions, and corrected in the latest Mozilla Thunderbird program, version 2.0.0.21 . This update provides the latest Thunderbird to correct these issues. Additionaly, Mozilla Thunderbird released with Mandriva Linux 2009.0, when used with Enigmail extension on x86_64 architechture, would freeze whenever any Enigmail function was used . Also, when used on i586 architecture, Thunderbird would crash when sending an email, if a file with an unknown extension was attached to it. This update also fixes those issues.