The Fedora Project announces the third and final test release of the Fedora Core 6 development cycle, available for the i386, x86_64, and ppc/ppc64 architectures, including Intel based Macintosh computers. Be aware that Test releases are recommended only for Linux experts/enthusiasts or for the technology evaluation, as many parts are likely to be broken and the rate of change is rapid.
http://fedoraproject.org/wiki/Core/Schedule
The final release of Fedora Core 6 is scheduled for release on October 11. At this point, the release is feature complete and in a locked down bug fix mode. It is important that we get your help in testing, reporting, and suggesting fixes for bugs. Please direct bugs to http://bugzilla.redhat.com, product Fedora Core, Version fc6test3. As always, be sure that your bug is not already fixed by updates and search for existing bugs before filing.
https://www.redhat.com/archives/fedora-devel-list/2006-September/msg00401.html