All APIs and the desktop itself are now fully stable!
I hope you’ll enjoy the many new features, the desktop effect, desktop layouts, the new configuration tool, the applets, changes, bug fixes and improvements that went into this release. This is a huge step forward for Cinnamon."
Phoronix also has a story about this, http://www.phoronix.com/scan.php?page=news_item&px=MTA0NzQ"
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