Per Secunia, some vulnerabilities have been reported in Mozilla Thunderbird, which can be exploited by malicious people to compromise a user's system.
For more information, please see: http://secunia.com/advisories/40323/
Solution
Update to version 3.0.5.
Original Advisory
Mozilla Foundation:
http://www.mozilla.org/security/announce/2010/mfsa2010-25.html
http://www.mozilla.org/security/announce/2010/mfsa2010-26.html
http://www.mozilla.org/security/announce/2010/mfsa2010-29.html
http://www.mozilla.org/security/announce/2010/mfsa2010-30.html
Sited:
http://secunia.com/advisories/40323/Posted by Cynthia Welch on June 28, 2010, in Handlers Log.