New mozilla-thunderbird packages are available for Slackware 10.2, and 11.0 to fix security issues.

Here are the details from the Slackware 11.0 ChangeLog:
+--------------------------+
xap/mozilla-thunderbird-1.5.0.10-i686-1.tgz:
Upgraded to thunderbird-1.5.0.10.
This upgrade fixes several possible security bugs.
For more information, see:
http://www.mozilla.org/projects/security/known-vulnerabilities.html#thunderbird
(* Security fix *)
+--------------------------+

Where to find the new packages:
+-----------------------------+

HINT: Getting slow download speeds from ftp.slackware.com? Give slackware.osuosl.org a try. This is another primary FTP site for Slackware that can be considerably faster than downloading from ftp.slackware.com.

Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating additional FTP and rsync hosting to the Slackware project! :-)

Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you.

Updated package for Slackware 10.2:
ftp://ftp.slackware.com/pub/slackware/slackware-10.2/patches/packages/mozilla-thunderbird-1.5.0.10-i686-1.tgz

Updated package for Slackware 11.0:
ftp://ftp.slackware.com/pub/slackware/slackware-11.0/patches/packages/mozilla-thunderbird-1.5.0.10-i686-1.tgz


MD5 signatures:
+-------------+

Slackware 10.2 package:
0605436c2c48d6848a5f5f3eed1a8835 mozilla-thunderbird-1.5.0.10-i686-1.tgz

Slackware 11.0 package:
0605436c2c48d6848a5f5f3eed1a8835 mozilla-thunderbird-1.5.0.10-i686-1.tgz


Installation instructions:
+------------------------+

Upgrade the packages as root:
# upgradepkg mozilla-thunderbird-1.5.0.10-i686-1.tgz


+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key
security@slackware.com