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GNOME 3 desktop environment GNOME 3 is the next generation of GNOME with a brand new user interface. It provides a completely new and modern desktop that has been designed for today's users and technologies. Fedora 15 is the first major distribution to include GNOME 3 by default. GNOME 3 is being developed with extensive upstream participation from Red Hat developers and Fedora volunteers, and GNOME 3 is tightly integrated in Fedora 15. GNOME Shell, the new user interface of GNOME 3, is polished, robust and extensible, and several GNOME Shell extensions and the GNOME tweak tool are available in the Fedora software repository. Thanks to the Fedora desktop team developers and community volunteers.

Btrfs filesystem Btrfs, the next generation filesystem is being developed with upstream participation of Red Hat developers, Oracle and many others. Btrfs is now available as a menu item in the installer (only for non-live images. live images support just Ext4) and does not require passing a special option to the installer as in the previous releases. Btrfs availability has moved up a notch as a incremental step towards the goal of Btrfs as the default filesystem in the next release of Fedora. The btrfsck program for performing filesystem checks is under active development upstream with participation from Fedora but the one included in this release is still limited and hence users are highly recommended to maintain backups when using this filesystem (backups are a good idea anyway!). Thanks to Josef Bacik, Red Hat Btrfs developer, for his upstream participation and integration of this feature in Fedora including a yum plugin (yum-plugin-fs-snapshot) that enables users to rollback updates if necessary, taking advantage of Btrfs snapshots.