Please update perl-Mail-Box to 2.081.
Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
perl-Mail-Box-2.082-1.fc9 has been submitted as an update for Fedora 9
perl-Mail-Box-2.082-1.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.