Phoronix: Ubuntu Plans To Stick To "Stable GNOME"

Ubuntu developers will be looking to stick to "stable" GNOME components and not closely track the unstable GNOME development releases within the Ubuntu 13.04 cycle. There's several reasons why Ubuntu will be distancing itself from the latest upstream GNOME packages...

http://www.phoronix.com/vr.php?view=MTIxODQ