Description of problem: PackageKit has the ability to create what is called service packs used for offline software installation. These are basically tar balls # file netbeans-fedora-11-i686.servicepack netbeans-fedora-11-i686.servicepack: POSIX tar archive file-roller should recognize and be able to extract files with this extension.
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle. Changing version to '11'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
PackageKit already installs a mimetype for servicepack files, in /usr/share/mime/packages/packagekit-servicepack.xml All you would need to do is make it a subclass of application/x-tar, then things should work.
commit 5df120da3d154345069db0665a4c3ed57d1d77ab Author: Richard Hughes <richard> Date: Fri Jun 12 10:30:22 2009 +0100 Add subclasses to our registered mime-types. Fixes rh#504137
PackageKit-0.4.8-2.fc11 has been submitted as an update for Fedora 11. http://admin.fedoraproject.org/updates/PackageKit-0.4.8-2.fc11
PackageKit-0.4.8-2.fc11 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.