Thunderbird 1.0.5 is Mozilla’s next generation e-mail client. Thunderbird makes emailing safer, faster and easier than ever before with the industry’s best implementations of features such as intelligent spam filters, a built-in spell checker, extension support, and much more.
What’s New:
    * Several security fixes
    * Stability improvements
Security Fixes:
    * [MFSA 2005-56] Code execution through shared function objects
    * [MFSA 2005-55] XHTML node spoofing
    * [MFSA 2005-52] Same origin violation: frame calling top.focus()
    * [MFSA 2005-50] Possibly exploitable crash in InstallVersion.compareTo()
    * [MFSA 2005-46] XBL scripts ran even when Javascript disabled
    * [MFSA 2005-44] Privilege escalation via non-DOM property overrides
    * [MFSA 2005-41] Privilege escalation via DOM property overrides
    * [MFSA 2005-40] Missing Install object instance checks
    * [MFSA 2005-33] Javascript “lambda” replace exposes memory contents