Comment 5 for bug 306610

Thanks for reporting this bug here and upstream. I can confirm this as well, and since there is enough information, I'll upgrade the bug status to Triaged and set the Importance.

Note that in Ubuntu it is
Edit->Preferences->General tab->Font list

connor@compy686:~$ apt-cache policy thunderbird
thunderbird:
  Installed: 2.0.0.18+nobinonly-0ubuntu0.8.04.1
  Candidate: 2.0.0.18+nobinonly-0ubuntu0.8.04.1
  Version table:
 *** 2.0.0.18+nobinonly-0ubuntu0.8.04.1 0
        500 http://ubuntu.media.mit.edu hardy-updates/main Packages
        500 http://security.ubuntu.com hardy-security/main Packages
        100 /var/lib/dpkg/status
     2.0.0.12+nobinonly-0ubuntu1 0
        500 http://ubuntu.media.mit.edu hardy/main Packages

connor@compy686:~$ uname -a
Linux compy686 2.6.24-20-generic #1 SMP Mon Jul 28 13:49:52 UTC 2008 i686 GNU/Linux

connor@compy686:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 8.04.1
Release: 8.04
Codename: hardy