jflex provides GUI, but doesn't install a .desktop file. According to Packaging Guidelines, if a package contains a GUI application, then it needs to also include a properly installed .desktop file.
jflex-1.4.3-8.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/jflex-1.4.3-8.fc17
jflex-1.4.3-8.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/jflex-1.4.3-8.fc16
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
Package jflex-1.4.3-8.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing jflex-1.4.3-8.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-7340/jflex-1.4.3-8.fc17 then log in and leave karma (feedback).
jflex-1.4.3-8.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
jflex-1.4.3-8.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.