groffer cannot start up, since its libdir is set incorrectly: The variable $groffer_libdir = File::Spec->catdir($at_at{'LIBDIR'}, 'groff', 'groffer'); should be set to $groffer_libdir = '/usr/share/groff/1.20.1/groffer';
groff-1.21-3.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/groff-1.21-3.fc15
Package groff-1.21-3.fc15: * should fix your issue, * was pushed to the Fedora 15 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing groff-1.21-3.fc15' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/groff-1.21-3.fc15 then log in and leave karma (feedback).
groff-1.21-3.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report.