There's several long-requested features in this release:
larger draggable borders on windows, antialiasing on rounded window
corners, and unredirection of full-screen 3D games for maximum
performance. Thanks to Jasper and Adel for this work!

About Mutter
============

Mutter is a window and compositing manager that displays and manages
your desktop via OpenGL. Mutter combines a sophisticated display
engine using the Clutter toolkit with solid window-management logic
inherited from the Metacity window manager.

While Mutter can be used stand-alone, it is primarily intended to be
used as the display core of a larger system such as GNOME Shell. For
this reason, Mutter is very extensible via plugins, which are used
both to add fancy visual effects and to rework the window management
behaviors to meet the needs of the environment.

News
====

* Extend the draggable portion of window borders outside the visible frame
for easy resizing with thin borders. (New draggable_border_width GConf key
controls the total width of visible and invisible borders.)
[Jasper; #644930]
* Draw rounded window corners with antialising [Jasper; #628195]
* Unredirect override-redirect fullscreen windows, such as full-screen
3D games to avoid any performance impact [Adel; #597014]
* Add :resizable and :above properties to MetaWindow. [Tim; #653858]
* Add MUTTER_DISABLE_FALLBACK_COLOR environment variable to allow visualizing
places where a color is missing for gtk:custom() colors [Florian; #656112]
* Don't attach modal dialogs to special windows like the desktop;
add meta_window_is_attached_dialog() [Dan, #646761]
* Make MetaBackgroundActor public, allow creating multiple instances
(sharing a common texture), and add a :dim-factor property
[Rui, Owen; #656433]
* Fix attached dialogs to not be resizable from the top and to be
position correctly [Jasper; #656619]
* Misc bug fixes [Jasper, Rui; #656335, #657583]

Contributors:
Tim Cuthbertson, Adel Gadllah, Rui Matos, Florian Müllner, Jasper St. Pierre,
Owen Taylor, Dan Winship

Translations:
Alexander Shopov [bg], Jorge González [es], Fran Dieguez [gl],
Yaron Shahrabani [he], Takeshi Aihana [ja], Aurimas ÄŒernius [lt],
Kjartan Maraas [nb], A S Alam [pa], Yuri Kozlov [ru], Daniel Nylander [se],
Theppitak Karoonboonyanan [th], Abduxukur Abdurixit [ug], Aron Xu [zh_CN]

Download
========

http://download.gnome.org/sources/mutter/3.1/mutter-3.1.90.tar.xz (1.57M)
sha256sum: b32681afac3f9eb3667b91b3ce28006aa79d8358e2abd15dece838b34ea7c67e

http://download.gnome.org/sources/mutter/3.1/mutter-3.1.90.tar.bz2 (1.92M)
sha256sum: ae7db1d50bafecde7aba2a149debc3b134a04d13b0fc6157c74edd547fc14f64