The thunderbird font selector (to set the default fonts for each encodings) is confused by fonts with many styles For exemple it lists "DejaVu Sans" many times in its lists without giving users a change to distinguish between the regular, condensed and extralight variants The GNOME font selector & OO.o get this stuff right thunderbird-2.0.0.6-2.fc8.x86_64 dejavu-fonts-experimental-2.19-1.fc8.noarch
We found that this bug has been already registered in the upstream database (https://bugzilla.mozilla.org/show_bug.cgi?id=421317) and believe that it is more appropriate to let it be resolved upstream. Red Hat will continue to track the issue in the centralized upstream bug tracker, and will review any bug fixes that become available for consideration in future updates. Thank you for the bug report.